There are big advantages and disadvantages using Martingale. In order to use it safely we need fairly large account but the larger the account is, the smaller the gain in % will be. Also we cannot use the power of compounding unless at some point we choose to start every new cycle with larger lot size which of course could make the system more profitable but also less safe.
Anyway, I tend to like this mathematical strategies because of their steady growth which is more likely what investors are looking for.
Could you share something more about your EA, I tried to open tasukigap.com but it's 'empty'.
"In trading, winning is frequently a question of luck, but losing is always a matter of skill."