The same idea was tried in some other EA's, but not successful, closing possitive trades and waiting for lossing trades to become possitive will not work always, and when it does not happen, it will hurt more. Simply, we are aiming for just a few amount of profit, and, we open several trades as a martingale, then we close the good ones and hang on with the bad ones, is it sound logical? We will be very much better off just open one trade and wait till it becomes possitive. It will never be painful than partially closing a martingale group. I think, no success will be achieved by that way. Just my opinion, we may have to find some other solution, I am sure a good solution to avoid build up trades will be found very soon.