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//+------------------------------------------------------------------+
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//| StochRSI_Slow.mq5 |
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//| Copyright 2025, xxxxxxxx |
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//| |
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//+------------------------------------------------------------------+
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#property copyright "Copyright 2025, xxxxxxxx"
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#property link ""
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#property version "1.01" // Corrected calculation loops to prevent array errors
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#property description "Slow Stochastic RSI Oscillator"
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//--- Indicator Window and Level Properties ---
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#property indicator_separate_window
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#property indicator_buffers 4 // %K, %D, RawK, and RSI buffer
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#property indicator_plots 2
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#property indicator_level1 20.0
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#property indicator_level2 80.0
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#property indicator_minimum -10.0
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#property indicator_maximum 110.0
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//--- Plot 1: %K line (Slow)
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#property indicator_label1 "%K"
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#property indicator_type1 DRAW_LINE
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#property indicator_color1 clrLightSeaGreen
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#property indicator_style1 STYLE_SOLID
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#property indicator_width1 1
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//--- Plot 2: %D line (Signal)
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#property indicator_label2 "%D"
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#property indicator_type2 DRAW_LINE
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#property indicator_color2 clrRed
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#property indicator_style2 STYLE_DOT
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#property indicator_width2 1
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//--- Input Parameters ---
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input int InpLengthRSI = 14;
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input int InpLengthStoch = 14;
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input int InpSlowing = 3;
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input int InpSmoothD = 3;
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input ENUM_APPLIED_PRICE InpAppliedPrice = PRICE_CLOSE;
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//--- Indicator Buffers ---
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double BufferK[];
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double BufferD[];
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double BufferRSI[];
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double BufferRawStochK[];
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//--- Global Variables ---
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int ExtLengthRSI, ExtLengthStoch, ExtSlowing, ExtSmoothD;
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int handle_rsi;
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//--- Forward declarations for helper functions ---
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double Highest(const double &array[], int period, int current_pos);
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double Lowest(const double &array[], int period, int current_pos);
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//+------------------------------------------------------------------+
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//| Custom indicator initialization function. |
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//+------------------------------------------------------------------+
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void OnInit()
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{
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ExtLengthRSI = (InpLengthRSI < 1) ? 1 : InpLengthRSI;
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ExtLengthStoch = (InpLengthStoch < 1) ? 1 : InpLengthStoch;
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ExtSlowing = (InpSlowing < 1) ? 1 : InpSlowing;
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ExtSmoothD = (InpSmoothD < 1) ? 1 : InpSmoothD;
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SetIndexBuffer(0, BufferK, INDICATOR_DATA);
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SetIndexBuffer(1, BufferD, INDICATOR_DATA);
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SetIndexBuffer(2, BufferRSI, INDICATOR_CALCULATIONS);
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SetIndexBuffer(3, BufferRawStochK, INDICATOR_CALCULATIONS);
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ArraySetAsSeries(BufferK, false);
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ArraySetAsSeries(BufferD, false);
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ArraySetAsSeries(BufferRSI, false);
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ArraySetAsSeries(BufferRawStochK, false);
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handle_rsi = iRSI(_Symbol, _Period, ExtLengthRSI, InpAppliedPrice);
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if(handle_rsi == INVALID_HANDLE)
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Print("Error creating iRSI handle.");
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IndicatorSetInteger(INDICATOR_DIGITS, 2);
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PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, ExtLengthRSI + ExtLengthStoch + ExtSlowing - 3);
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PlotIndexSetInteger(1, PLOT_DRAW_BEGIN, ExtLengthRSI + ExtLengthStoch + ExtSlowing + ExtSmoothD - 4);
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IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("Slow StochRSI(%d,%d,%d,%d)", ExtLengthRSI, ExtLengthStoch, ExtSlowing, ExtSmoothD));
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}
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//+------------------------------------------------------------------+
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//| Slow Stochastic RSI calculation function. |
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//+------------------------------------------------------------------+
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int OnCalculate(const int rates_total,
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const int prev_calculated,
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const datetime &time[],
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const double &open[],
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const double &high[],
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const double &low[],
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const double &close[],
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const long &tick_volume[],
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const long &volume[],
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const int &spread[])
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{
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if(rates_total < ExtLengthRSI + ExtLengthStoch)
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return(0);
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//--- STEP 1: Get RSI values from the standard indicator
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if(BarsCalculated(handle_rsi) < rates_total)
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return(0);
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if(CopyBuffer(handle_rsi, 0, 0, rates_total, BufferRSI) <= 0)
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return(0);
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//--- Main calculation loop
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for(int i = 0; i < rates_total; i++)
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{
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//--- STEP 2: Calculate Raw Stochastic %K on the RSI buffer ---
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if(i >= ExtLengthRSI + ExtLengthStoch - 2)
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{
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double highest_rsi = Highest(BufferRSI, ExtLengthStoch, i);
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double lowest_rsi = Lowest(BufferRSI, ExtLengthStoch, i);
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double range = highest_rsi - lowest_rsi;
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if(range > 0.00001)
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BufferRawStochK[i] = (BufferRSI[i] - lowest_rsi) / range * 100.0;
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else
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BufferRawStochK[i] = (i > 0) ? BufferRawStochK[i-1] : 50.0;
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}
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else
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{
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BufferRawStochK[i] = 0;
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}
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//--- STEP 3: Calculate Slow %K (Main Line) by smoothing Raw %K ---
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if(i >= ExtLengthRSI + ExtLengthStoch + ExtSlowing - 3)
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{
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double sum = 0;
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for(int j = 0; j < ExtSlowing; j++)
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{
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sum += BufferRawStochK[i-j];
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}
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BufferK[i] = sum / ExtSlowing;
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}
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else
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{
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BufferK[i] = 0;
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}
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//--- STEP 4: Calculate %D (Signal Line) by smoothing Slow %K ---
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if(i >= ExtLengthRSI + ExtLengthStoch + ExtSlowing + ExtSmoothD - 4)
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{
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double sum = 0;
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for(int j = 0; j < ExtSmoothD; j++)
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{
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sum += BufferK[i-j];
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}
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BufferD[i] = sum / ExtSmoothD;
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}
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else
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{
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BufferD[i] = 0;
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}
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}
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return(rates_total);
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}
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//+------------------------------------------------------------------+
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//| Finds the highest value in a given period of an array. |
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//+------------------------------------------------------------------+
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double Highest(const double &array[], int period, int current_pos)
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{
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double res = array[current_pos];
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for(int i = 1; i < period; i++)
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{
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int index = current_pos - i;
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if(index < 0)
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break;
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if(res < array[index])
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res = array[index];
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}
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return(res);
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}
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//+------------------------------------------------------------------+
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//| Finds the lowest value in a given period of an array. |
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//+------------------------------------------------------------------+
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double Lowest(const double &array[], int period, int current_pos)
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{
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double res = array[current_pos];
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for(int i = 1; i < period; i++)
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{
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int index = current_pos - i;
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if(index < 0)
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break;
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if(res > array[index])
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res = array[index];
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}
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return(res);
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}
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//+------------------------------------------------------------------+
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//+------------------------------------------------------------------+
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