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//+------------------------------------------------------------------+
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//| StochasticSlow_HeikinAshi.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 "2.00" // Refactored for full recalculation and stability
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#property description "Slow Stochastic Oscillator on Heikin Ashi data"
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#include <MyIncludes\HeikinAshi_Tools.mqh>
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//--- Indicator Window and Level Properties ---
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#property indicator_separate_window
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#property indicator_buffers 3 // %K, %D, and Raw %K for calculation
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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 0.0
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#property indicator_maximum 100.0
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//--- Plot 1: %K line (Slow)
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#property indicator_label1 "HA_%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 "HA_%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 InpKPeriod = 5; // %K Period
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input int InpDPeriod = 3; // %D Period (signal line smoothing)
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input int InpSlowing = 3; // Slowing (initial %K smoothing)
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//--- Indicator Buffers ---
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double BufferHA_K[]; // Plotted buffer for the main (Slow) %K line
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double BufferHA_D[]; // Plotted buffer for the signal %D line
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double BufferRawK[]; // Calculation buffer for raw %K before slowing
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//--- Intermediate Heikin Ashi Buffers ---
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double ExtHaOpenBuffer[];
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double ExtHaHighBuffer[];
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double ExtHaLowBuffer[];
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double ExtHaCloseBuffer[];
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//--- Global Objects and Variables ---
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int g_ExtKPeriod, g_ExtDPeriod, g_ExtSlowing;
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CHeikinAshi_Calculator *g_ha_calculator; // Pointer to our Heikin Ashi calculator
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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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int OnInit()
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{
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//--- Validate and store input periods
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g_ExtKPeriod = (InpKPeriod < 1) ? 1 : InpKPeriod;
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g_ExtDPeriod = (InpDPeriod < 1) ? 1 : InpDPeriod;
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g_ExtSlowing = (InpSlowing < 1) ? 1 : InpSlowing;
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//--- Map the buffers and set as non-timeseries
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SetIndexBuffer(0, BufferHA_K, INDICATOR_DATA);
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SetIndexBuffer(1, BufferHA_D, INDICATOR_DATA);
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SetIndexBuffer(2, BufferRawK, INDICATOR_CALCULATIONS);
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ArraySetAsSeries(BufferHA_K, false);
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ArraySetAsSeries(BufferHA_D, false);
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ArraySetAsSeries(BufferRawK, false);
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//--- Set indicator display properties
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IndicatorSetInteger(INDICATOR_DIGITS, 2);
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PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, g_ExtKPeriod + g_ExtSlowing - 2);
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PlotIndexSetInteger(1, PLOT_DRAW_BEGIN, g_ExtKPeriod + g_ExtSlowing + g_ExtDPeriod - 3);
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IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("HA_Slow_Stoch(%d,%d,%d)", g_ExtKPeriod, g_ExtDPeriod, g_ExtSlowing));
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//--- Create the calculator instance
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g_ha_calculator = new CHeikinAshi_Calculator();
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if(CheckPointer(g_ha_calculator) == POINTER_INVALID)
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{
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Print("Error creating CHeikinAshi_Calculator object");
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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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//| Custom indicator deinitialization function. |
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//+------------------------------------------------------------------+
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void OnDeinit(const int reason)
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{
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//--- Free the calculator object
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if(CheckPointer(g_ha_calculator) != POINTER_INVALID)
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{
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delete g_ha_calculator;
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g_ha_calculator = NULL;
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}
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}
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//+------------------------------------------------------------------+
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//| Slow Stochastic on Heikin Ashi 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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//--- Check if there is enough historical data
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if(rates_total < g_ExtKPeriod + g_ExtSlowing + g_ExtDPeriod - 2)
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return(0);
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//--- Resize intermediate buffers
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ArrayResize(ExtHaOpenBuffer, rates_total);
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ArrayResize(ExtHaHighBuffer, rates_total);
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ArrayResize(ExtHaLowBuffer, rates_total);
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ArrayResize(ExtHaCloseBuffer, rates_total);
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//--- STEP 1: Calculate Heikin Ashi bars
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g_ha_calculator.Calculate(rates_total, open, high, low, close,
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ExtHaOpenBuffer, ExtHaHighBuffer, ExtHaLowBuffer, ExtHaCloseBuffer);
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//--- STEP 2: Calculate Raw %K (Fast %K) using Heiken Ashi data
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for(int i = g_ExtKPeriod - 1; i < rates_total; i++)
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{
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double highest_ha_high = Highest(ExtHaHighBuffer, g_ExtKPeriod, i);
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double lowest_ha_low = Lowest(ExtHaLowBuffer, g_ExtKPeriod, i);
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double range = highest_ha_high - lowest_ha_low;
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if(range > 0)
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BufferRawK[i] = (ExtHaCloseBuffer[i] - lowest_ha_low) / range * 100.0;
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else
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BufferRawK[i] = (i > 0) ? BufferRawK[i-1] : 50.0;
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}
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//--- STEP 3: Calculate Slow %K (Main Line) by smoothing Raw %K
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int k_slow_start_pos = g_ExtKPeriod + g_ExtSlowing - 2;
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for(int i = k_slow_start_pos; i < rates_total; i++)
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{
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double sum = 0;
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for(int j = 0; j < g_ExtSlowing; j++)
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{
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sum += BufferRawK[i-j];
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}
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BufferHA_K[i] = sum / g_ExtSlowing;
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}
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//--- STEP 4: Calculate %D (Signal Line) by smoothing Slow %K
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int d_start_pos = g_ExtKPeriod + g_ExtSlowing + g_ExtDPeriod - 3;
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for(int i = d_start_pos; i < rates_total; i++)
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{
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double sum = 0;
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for(int j = 0; j < g_ExtDPeriod; j++)
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{
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sum += BufferHA_K[i-j];
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}
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BufferHA_D[i] = sum / g_ExtDPeriod;
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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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