I found some thread about started by MQ: Rating System of Trading Signals Improved
thanks

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Hi
I follow the signals, but yet I could not find out how mql5.com does rate a signal ,
I think that is it related to several parameter like
-number of trade
-%winning of trades
-ave of pips
-profit per month
and ...
if someone knows that please tell me, because I wonder I see some signals in top ten rating with hidden huge drawdown , it causes that many subscribers lose its confidence to this rating list,
you yourself can see:
https://www.mql5.com/en/signals/mt4/real