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//+------------------------------------------------------------------+
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//| ZigZag Analyzer.mq5|
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//| Copyright 2025, MetaQuotes Ltd.|
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//| https://www.mql5.com/en/users/lynnchris|
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//+------------------------------------------------------------------+
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#property copyright "Copyright 2025, MetaQuotes Ltd."
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#property link "https://www.mql5.com/en/users/lynnchris"
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#property version "1.0"
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#property strict
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//
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#include "../Libraries/x-saherelm.common.lib.mq5"
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// Input parameters
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input ENUM_TIMEFRAMES InpTimeFrame = PERIOD_CURRENT; // Timeframe to analyze
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input int ZZ_Depth = 12; // ZigZag depth
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input int ZZ_Deviation = 5; // ZigZag deviation
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input int ZZ_Backstep = 3; // ZigZag backstep
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input int LookBackBars = 500; // Bars to search for pivots
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input int ExtendFutureBars = 100; // Bars to extend trendlines into the future
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// Global indicator handle for ZigZag
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int zzHandle;
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// Arrays for ZigZag data and pivot storage
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double zzBuffer[];
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bool pivotIsPeak[];
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double pivotPrices[];
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datetime pivotTimes[];
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// Variable to detect new bars
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datetime lastBarTime = 0;
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//+------------------------------------------------------------------+
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//| Initialization function |
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//+------------------------------------------------------------------+
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int OnInit()
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{
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//
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zzHandle = iCustom(
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_Symbol,
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InpTimeFrame,
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"x-saherelm.xzg",
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"",
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ZZ_Depth,
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ZZ_Deviation,
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ZZ_Backstep,
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X_PRICE_HIGH,
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X_PRICE_LOW,
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"",
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false,
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false,
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true,
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159,
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159 //
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);
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if (zzHandle == INVALID_HANDLE)
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{
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Print("Error creating ZigZag handle");
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return (INIT_FAILED);
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}
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return (INIT_SUCCEEDED);
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}
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//+------------------------------------------------------------------+
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//| Deinitialization function |
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//+------------------------------------------------------------------+
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void OnDeinit(const int reason)
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{
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ObjectDelete(0, "Downtrend_HighLine");
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ObjectDelete(0, "Downtrend_LowLine");
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ObjectDelete(0, "Major_Resistance");
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ObjectDelete(0, "Major_Support");
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ObjectDelete(0, "Minor_Resistance");
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ObjectDelete(0, "Minor_Support");
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IndicatorRelease(zzHandle);
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}
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//+------------------------------------------------------------------+
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//| Tick function |
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//+------------------------------------------------------------------+
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void OnTick()
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{
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datetime currentBarTime = iTime(_Symbol, InpTimeFrame, 0);
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if (currentBarTime == lastBarTime)
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return;
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lastBarTime = currentBarTime;
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// Remove previous objects
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ObjectDelete(0, "Downtrend_HighLine");
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ObjectDelete(0, "Downtrend_LowLine");
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ObjectDelete(0, "Major_Resistance");
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ObjectDelete(0, "Major_Support");
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ObjectDelete(0, "Minor_Resistance");
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ObjectDelete(0, "Minor_Support");
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if (CopyBuffer(zzHandle, 0, 0, LookBackBars, zzBuffer) <= 0)
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{
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Print("Failed to copy ZigZag data");
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return;
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}
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ArraySetAsSeries(zzBuffer, true);
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DrawZigZagTrendlines();
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DrawSupportResistance();
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}
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//+------------------------------------------------------------------+
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//| Draw ZigZag-based Trendlines |
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//+------------------------------------------------------------------+
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void DrawZigZagTrendlines()
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{
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double highPrices[10], lowPrices[10];
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datetime highTimes[10], lowTimes[10];
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int highCount = 0, lowCount = 0;
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// Extract swing points from the ZigZag buffer
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for (int i = 0; i < LookBackBars - 1; i++)
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{
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if (zzBuffer[i] != 0)
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{
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if (iHigh(_Symbol, InpTimeFrame, i) == zzBuffer[i] && highCount < 10)
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{
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highPrices[highCount] = zzBuffer[i];
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highTimes[highCount] = iTime(_Symbol, InpTimeFrame, i);
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highCount++;
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}
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else if (iLow(_Symbol, InpTimeFrame, i) == zzBuffer[i] && lowCount < 10)
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{
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lowPrices[lowCount] = zzBuffer[i];
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lowTimes[lowCount] = iTime(_Symbol, InpTimeFrame, i);
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lowCount++;
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}
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}
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}
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// Exclude the most recent swing if possible
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int usedHighCount = (highCount >= 4) ? highCount - 1 : highCount;
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int usedLowCount = (lowCount >= 4) ? lowCount - 1 : lowCount;
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double mHigh = 0, bHigh = 0, mLow = 0, bLow = 0;
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bool validHigh = false, validLow = false;
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// Regression for highs
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if (usedHighCount >= 3)
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{
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double sumT = 0, sumP = 0, sumTP = 0, sumT2 = 0;
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for (int i = 0; i < usedHighCount; i++)
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{
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double t = (double)highTimes[i];
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double p = highPrices[i];
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sumT += t;
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sumP += p;
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sumTP += t * p;
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sumT2 += t * t;
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}
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int N = usedHighCount;
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double denominator = N * sumT2 - sumT * sumT;
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if (denominator != 0)
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{
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mHigh = (N * sumTP - sumT * sumP) / denominator;
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bHigh = (sumP - mHigh * sumT) / N;
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}
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else
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bHigh = sumP / N;
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validHigh = true;
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}
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// Regression for lows
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if (usedLowCount >= 3)
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{
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double sumT = 0, sumP = 0, sumTP = 0, sumT2 = 0;
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for (int i = 0; i < usedLowCount; i++)
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{
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double t = (double)lowTimes[i];
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double p = lowPrices[i];
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sumT += t;
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sumP += p;
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sumTP += t * p;
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sumT2 += t * t;
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}
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int N = usedLowCount;
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double denominator = N * sumT2 - sumT * sumT;
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if (denominator != 0)
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{
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mLow = (N * sumTP - sumT * sumP) / denominator;
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bLow = (sumP - mLow * sumT) / N;
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}
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else
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bLow = sumP / N;
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validLow = true;
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}
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// Define time limits for trendlines
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datetime pastTime = iTime(_Symbol, InpTimeFrame, LookBackBars - 1);
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datetime futureTime = lastBarTime + ExtendFutureBars * PeriodSeconds();
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// Draw trendlines if both regressions are valid
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if (validHigh && validLow)
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{
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// When slopes have the same sign, use average slope
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if (mHigh * mLow > 0)
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{
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double mParallel = (mHigh + mLow) / 2.0;
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double bHighParallel = highPrices[0] - mParallel * (double)highTimes[0];
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double bLowParallel = lowPrices[0] - mParallel * (double)lowTimes[0];
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datetime highStartTime = pastTime;
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double highStartPrice = mParallel * (double)highStartTime + bHighParallel;
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double highEndPrice = mParallel * (double)futureTime + bHighParallel;
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if (!ObjectCreate(0, "Downtrend_HighLine", OBJ_TREND, 0, highStartTime, highStartPrice, futureTime, highEndPrice))
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Print("Failed to create High Trendline");
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else
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{
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ObjectSetInteger(0, "Downtrend_HighLine", OBJPROP_COLOR, clrRed);
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ObjectSetInteger(0, "Downtrend_HighLine", OBJPROP_RAY_LEFT, true);
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ObjectSetInteger(0, "Downtrend_HighLine", OBJPROP_RAY_RIGHT, true);
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}
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datetime lowStartTime = pastTime;
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double lowStartPrice = mParallel * (double)lowStartTime + bLowParallel;
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double lowEndPrice = mParallel * (double)futureTime + bLowParallel;
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if (!ObjectCreate(0, "Downtrend_LowLine", OBJ_TREND, 0, lowStartTime, lowStartPrice, futureTime, lowEndPrice))
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Print("Failed to create Low Trendline");
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else
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{
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ObjectSetInteger(0, "Downtrend_LowLine", OBJPROP_COLOR, clrGreen);
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ObjectSetInteger(0, "Downtrend_LowLine", OBJPROP_RAY_LEFT, true);
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ObjectSetInteger(0, "Downtrend_LowLine", OBJPROP_RAY_RIGHT, true);
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}
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}
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else
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{
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datetime highStartTime = pastTime;
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double highStartPrice = mHigh * (double)highStartTime + bHigh;
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double highEndPrice = mHigh * (double)futureTime + bHigh;
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if (!ObjectCreate(0, "Downtrend_HighLine", OBJ_TREND, 0, highStartTime, highStartPrice, futureTime, highEndPrice))
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Print("Failed to create High Trendline");
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else
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{
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ObjectSetInteger(0, "Downtrend_HighLine", OBJPROP_COLOR, clrRed);
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ObjectSetInteger(0, "Downtrend_HighLine", OBJPROP_RAY_LEFT, true);
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ObjectSetInteger(0, "Downtrend_HighLine", OBJPROP_RAY_RIGHT, true);
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}
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datetime lowStartTime = pastTime;
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double lowStartPrice = mLow * (double)lowStartTime + bLow;
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double lowEndPrice = mLow * (double)futureTime + bLow;
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if (!ObjectCreate(0, "Downtrend_LowLine", OBJ_TREND, 0, lowStartTime, lowStartPrice, futureTime, lowEndPrice))
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Print("Failed to create Low Trendline");
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else
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{
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ObjectSetInteger(0, "Downtrend_LowLine", OBJPROP_COLOR, clrGreen);
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ObjectSetInteger(0, "Downtrend_LowLine", OBJPROP_RAY_LEFT, true);
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ObjectSetInteger(0, "Downtrend_LowLine", OBJPROP_RAY_RIGHT, true);
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}
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}
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}
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else
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{
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if (validHigh)
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{
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datetime highStartTime = pastTime;
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double highStartPrice = mHigh * (double)highStartTime + bHigh;
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double highEndPrice = mHigh * (double)futureTime + bHigh;
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if (!ObjectCreate(0, "Downtrend_HighLine", OBJ_TREND, 0, highStartTime, highStartPrice, futureTime, highEndPrice))
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Print("Failed to create High Trendline");
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else
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{
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ObjectSetInteger(0, "Downtrend_HighLine", OBJPROP_COLOR, clrRed);
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ObjectSetInteger(0, "Downtrend_HighLine", OBJPROP_RAY_LEFT, true);
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ObjectSetInteger(0, "Downtrend_HighLine", OBJPROP_RAY_RIGHT, true);
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}
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}
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if (validLow)
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{
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datetime lowStartTime = pastTime;
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double lowStartPrice = mLow * (double)lowStartTime + bLow;
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double lowEndPrice = mLow * (double)futureTime + bLow;
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if (!ObjectCreate(0, "Downtrend_LowLine", OBJ_TREND, 0, lowStartTime, lowStartPrice, futureTime, lowEndPrice))
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Print("Failed to create Low Trendline");
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else
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{
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ObjectSetInteger(0, "Downtrend_LowLine", OBJPROP_COLOR, clrGreen);
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ObjectSetInteger(0, "Downtrend_LowLine", OBJPROP_RAY_LEFT, true);
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ObjectSetInteger(0, "Downtrend_LowLine", OBJPROP_RAY_RIGHT, true);
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}
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}
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}
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}
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//+------------------------------------------------------------------+
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//| Draw Support and Resistance Levels |
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//+------------------------------------------------------------------+
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void DrawSupportResistance()
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{
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double confirmedHighs[10], confirmedLows[10];
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int confHighCount = 0, confLowCount = 0;
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for (int i = 0; i < LookBackBars - 1; i++)
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{
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if (zzBuffer[i] != 0)
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{
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if (iHigh(_Symbol, InpTimeFrame, i) == zzBuffer[i] && confHighCount < 10)
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{
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confirmedHighs[confHighCount] = zzBuffer[i];
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confHighCount++;
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}
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else if (iLow(_Symbol, InpTimeFrame, i) == zzBuffer[i] && confLowCount < 10)
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{
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confirmedLows[confLowCount] = zzBuffer[i];
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confLowCount++;
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}
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}
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}
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int usedHighCount = (confHighCount >= 4) ? confHighCount - 1 : confHighCount;
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int usedLowCount = (confLowCount >= 4) ? confLowCount - 1 : confLowCount;
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double majorResistance = -1e9, majorSupport = 1e9;
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double minorResistance = -1e9, minorSupport = 1e9;
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double tempHigh = -1e9, tempLow = -1e9;
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for (int i = 0; i < usedHighCount; i++)
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{
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if (confirmedHighs[i] > majorResistance)
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{
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tempHigh = majorResistance;
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majorResistance = confirmedHighs[i];
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}
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else if (confirmedHighs[i] > tempHigh)
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{
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tempHigh = confirmedHighs[i];
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}
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}
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if (tempHigh > -1e9)
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minorResistance = tempHigh;
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for (int i = 0; i < usedLowCount; i++)
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{
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if (confirmedLows[i] < majorSupport)
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{
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tempLow = majorSupport;
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majorSupport = confirmedLows[i];
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}
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else if (confirmedLows[i] < tempLow)
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{
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tempLow = confirmedLows[i];
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}
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}
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if (tempLow < 1e9)
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minorSupport = tempLow;
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if (usedHighCount > 0)
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{
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if (!ObjectCreate(0, "Major_Resistance", OBJ_HLINE, 0, 0, majorResistance))
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Print("Failed to create Major Resistance");
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else
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ObjectSetInteger(0, "Major_Resistance", OBJPROP_COLOR, clrMagenta);
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if (minorResistance > -1e9 && minorResistance < majorResistance)
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{
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if (!ObjectCreate(0, "Minor_Resistance", OBJ_HLINE, 0, 0, minorResistance))
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Print("Failed to create Minor Resistance");
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else
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ObjectSetInteger(0, "Minor_Resistance", OBJPROP_COLOR, clrFuchsia);
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}
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}
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if (usedLowCount > 0)
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{
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if (!ObjectCreate(0, "Major_Support", OBJ_HLINE, 0, 0, majorSupport))
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Print("Failed to create Major Support");
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else
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ObjectSetInteger(0, "Major_Support", OBJPROP_COLOR, clrAqua);
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if (minorSupport < 1e9 && minorSupport > majorSupport)
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{
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if (!ObjectCreate(0, "Minor_Support", OBJ_HLINE, 0, 0, minorSupport))
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Print("Failed to create Minor Support");
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else
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ObjectSetInteger(0, "Minor_Support", OBJPROP_COLOR, clrBlue);
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}
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}
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}
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//+------------------------------------------------------------------+
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