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How History Center in MT4 calculate volume from OHLC data?

When I download history data in form of csv file. All value in Volume column are zero after I import that file to the History Center in MT4 it can show volume. What is the formula they using for calculating the volume from OHLC data

optimization back test reject profit cases

I've tested EA with optimization back test (36 cases), I got just 1 profit case. So, I uncheck "skip useless result" for getting all result. I got 1 profit case, 1 loss case, and 34 zero profit cases. I decide to choose 1 of zero profit cases for doing normal back test, the result for this case I

Why dose mt4 reject profit case when doing optimization back test?

I've tested EA with optimization back test (36 cases), I got just 1 profit case. So, I uncheck "skip useless result" for getting all result. I got 1 profit case, 1 loss case, and 34 zero profit cases. I decide to choose 1 of zero profit cases for doing normal back test, the result for this case I

How to protect EA from copy trade?

If we created EAs for sellig and someone had bought them. Then, he used our EA to sell the signal for copy trade. Do we have any technique to protect this situation