How can EA profit by lagging indicators in trading conditions

 
I want some suggestions from developers.I can make EA profitable by Grid systems but I not get profit conditions in indicator EA.What concepts need to build profitable EA by these **** indicators.Do you have some references links.
Thanks.
 
Grid systems are the same as Martingale, guaranteed to blow your account eventually. If it's not profitable without, it is definitely not profitable with.
          Martingale vs. Non Martingale (Simplified RoR vs Profit and the Illusions) - MQL5 programming forum
Why it won't work: Calculate Loss from Lot Pips - MQL5 programming forum
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