WalkForwardOptimizer MT5

WalkForwardOptimizer library allows you to perform rolling and cluster walk-forward optimization of expert advisers (EA) in MetaTrader 5.

To use the library include its header file WalkForwardOptimizer.mqh into your EA source code, add call provided functions as appropriate.

Once the library is embedded into EA, you may start optimization according to the procedure described in the User guide. When it's finished, intermediate results are saved into a CSV file and some special global variables. Also a comprehensible report is generated as HTML page.

The text is shortened due to size limit - download full file from Comments.

WalkForwardOptimizer.mqh Header File

#define DAYS_PER_WEEK    7
#define DAYS_PER_MONTH   30
#define DAYS_PER_QUARTER (DAYS_PER_MONTH*3)
#define DAYS_PER_HALF    (DAYS_PER_MONTH*6)
#define DAYS_PER_YEAR    (DAYS_PER_MONTH*12)

#define SEC_PER_DAY     (60*60*24)
#define SEC_PER_WEEK    (SEC_PER_DAY*DAYS_PER_WEEK)
#define SEC_PER_MONTH   (SEC_PER_DAY*DAYS_PER_MONTH)
#define SEC_PER_QUARTER (SEC_PER_MONTH*3)
#define SEC_PER_HALF    (SEC_PER_MONTH*6)
#define SEC_PER_YEAR    (SEC_PER_MONTH*12)

#define CUSTOM_DAYS     -1

enum WFO_TIME_PERIOD {none = 0, year = DAYS_PER_YEAR, halfyear = DAYS_PER_HALF, quarter = DAYS_PER_QUARTER, month = DAYS_PER_MONTH, week = DAYS_PER_WEEK, day = 1, custom = CUSTOM_DAYS};

enum WFO_ESTIMATION_METHOD {wfo_built_in_loose, wfo_built_in_strict, wfo_profit, wfo_sharpe, wfo_pf, wfo_drawdown, wfo_profit_by_drawdown, wfo_profit_trades_by_drawdown, wfo_average, wfo_expression};

#import "WalkForwardOptimizer MT5.ex5" // !after install must be copied into MQL5/Libraries
void wfo_setEstimationMethod(WFO_ESTIMATION_METHOD estimation, string formula);
void wfo_setPFmax(double max);
void wfo_setCloseTradesOnSeparationLine(bool b);
void wfo_OnTesterPass();
int wfo_OnInit(WFO_TIME_PERIOD optimizeOn, WFO_TIME_PERIOD optimizeStep, int optimizeStepOffset, int optimizeCustomW, int optimizeCustomS);
int wfo_OnTick();
double wfo_OnTester();
void wfo_OnTesterInit(string optimizeLog);
void wfo_OnTesterDeinit();
#import

input WFO_TIME_PERIOD wfo_windowSize = year;
input int wfo_customWindowSizeDays = 0;
input WFO_TIME_PERIOD wfo_stepSize = quarter;
input int wfo_customStepSizePercent = 0;
input int wfo_stepOffset = 0;
input string wfo_outputFile = "";
input WFO_ESTIMATION_METHOD wfo_estimation = wfo_built_in_loose;
input string wfo_formula = "";

Example of Usage

#include <WalkForwardOptimizer.mqh>

...

int OnInit(void)
{
  // your actual code goes here
  ...

  wfo_setEstimationMethod(wfo_estimation, wfo_formula); // wfo_built_in_loose by default
  wfo_setPFmax(100); // DBL_MAX by default
  // wfo_setCloseTradesOnSeparationLine(true); // false by default
  
  // this is the only required call in OnInit, all parameters come from the header
  int r = wfo_OnInit(wfo_windowSize, wfo_stepSize, wfo_stepOffset, wfo_customWindowSizeDays, wfo_customStepSizePercent);
  
  return(r);
}

void OnTesterInit()
{
  wfo_OnTesterInit(wfo_outputFile); // required
}

void OnTesterDeinit()
{
  wfo_OnTesterDeinit(); // required
}

void OnTesterPass()
{
  wfo_OnTesterPass(); // required
}

double OnTester()
{
  return wfo_OnTester(); // required
}

void OnTick(void)
{
  int wfo = wfo_OnTick();
  if(wfo == -1)
  {
    // can do some non-trading stuff, such as gathering bar or ticks statistics
    return;
  }
  else if(wfo == +1)
  {
    // can do some non-trading stuff
    return;
  }

  // your actual code goes here
  ...
}