I created a script, so if you are using Equity, Balance, or Free Margin risk based lot size as per the below picture and block. So if you export your code to mq5, then load my script it will automatically replace the necessary code to give accurate volume size on pairs like gold that never used to calculate correctly.
You still need tp specify your Risk in %, Max lot and Stop loss either in distance or price level but other than that it should work.
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Also a warning I do run these project options, 0.01 = 0.1 is an extra addition.
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Below is a Python script, so make a text file and put this code into it and then change the file etension to .py when you run the code it will request a file to open, select desired mql5 and it will change the code internally automatically. Python is required on your pc for script to work.
import tkinter as tk
from tkinter import filedialog
def replace_and_add_code(file_path):
try:
# Open the file with UTF-16 Little Endian encoding
with open(file_path, 'r', encoding='utf-16-le') as file:
content = file.read()
# Replace the size calculations
old_code = [
'else if (mode=="equityRisk") {size=((value/100)*AccountEquity())/(sl*TickValue*PipValue(symbol));}',
'else if (mode=="balanceRisk"){size=((value/100)*AccountBalance())/(sl*TickValue*PipValue(symbol));}',
'else if (mode=="freemarginRisk") {size=((value/100)*AccountFreeMargin())/(sl*TickValue*PipValue(symbol));}'
]
new_code = [
'else if (mode=="equityRisk") {size = VolLongPoints(symbol,(value/100)*AccountEquity(),10*sl);}',
'else if (mode=="balanceRisk"){size = VolLongPoints(symbol,(value/100)*AccountBalance(),10*sl);}',
'else if (mode=="freemarginRisk") {size = VolLongPoints(symbol,(value/100)*AccountFreeMargin(),10*sl);}'
]
for j in range(len(old_code)):
content = content.replace(old_code[j], new_code[j])
# Define the new function to add
function_to_add = '''
double VolLongPoints(string pSymbol, double pMoney, double pSlp)
{
double Volstep = SymbolInfoDouble(pSymbol,SYMBOL_VOLUME_STEP);
double Volmax = SymbolInfoDouble(pSymbol,SYMBOL_VOLUME_MAX);
double Volmin = SymbolInfoDouble(pSymbol,SYMBOL_VOLUME_MIN);
pMoney = floor(pMoney);
double tickSize = SymbolInfoDouble(pSymbol,SYMBOL_TRADE_TICK_SIZE);
double freeMargin = AccountInfoDouble(ACCOUNT_MARGIN_FREE);
double point = SymbolInfoDouble(pSymbol,SYMBOL_POINT);
double Price = SymbolInfoDouble(pSymbol,SYMBOL_ASK);
Price = round(Price/tickSize)*tickSize;
double slPrice = Price - pSlp * point;
slPrice = round(slPrice/tickSize)*tickSize;
double dbProfit = 0;
double riskLots = 0;
double OrderLots = 0;
double reqMarg = 0;
if(OrderCalcProfit(ORDER_TYPE_BUY, pSymbol, Volmax, Price, slPrice, dbProfit) == true)
{
OrderLots = fmin(fmax(round(pMoney * Volmax / (MathAbs(dbProfit) * Volstep))
* Volstep, Volmin), Volmax);
}
else
if(!OrderCalcProfit(ORDER_TYPE_BUY, pSymbol, Volmax, Price, slPrice, dbProfit))
{
Print("Volume calc Failed: ", GetLastError());
}
//------
if(OrderCalcMargin(ORDER_TYPE_BUY,pSymbol,OrderLots,Price,reqMarg) == true)
{
double R = MathAbs(floor(freeMargin) / round(reqMarg)); // Calculate the ratio
double OrderLotsAdjusted = 0;
if(R < 1) // Check if the free margin is less than the required margin
{
OrderLotsAdjusted = OrderLots * R; // Reduce the order volume proportionally
Print("Not enough money to execute trades with : ",DoubleToString(OrderLots)," Volume adjusted based on free margin to required margin ratio to : ",DoubleToString(OrderLotsAdjusted));
OrderLots = OrderLotsAdjusted;
}
}
if(OrderLots < Volmin)
{
OrderLots = Volmin;
}
riskLots = floor(OrderLots/Volstep)*Volstep;
return riskLots;
}
'''
# Insert the new function above 'double AccountBalance()'
insert_index = content.find('double AccountBalance()')
if insert_index != -1:
content = content[:insert_index] + function_to_add + content[insert_index:]
# Write the changes back to the file
with open(file_path, 'w', encoding='utf-16-le') as file:
file.write(content)
print("File updated successfully.")
except Exception as e:
print(f"An error occurred: {e}")
def main():
root = tk.Tk()
root.title("File Selector")
root.geometry('300x150')
def select_file():
file_path = filedialog.askopenfilename(
title="Select the .mq5 file",
filetypes=[("MQL5 files", "*.mq5")]
)
if file_path:
replace_and_add_code(file_path)
label.config(text="File Processed")
else:
label.config(text="No file selected.")
label = tk.Label(root, text="Please select your .mq5 file")
label.pack(pady=10)
btn = tk.Button(root, text="Select File", command=select_file)
btn.pack(pady=10)
root.mainloop()
if __name__ == "__main__":
main()
