Just 1 personal experience from using copiers and this might be helpful to some.
I used to exit trades and to enter trades quickly by clicking on the "reverse" button on the DOM.
This ignorance part of mine had cost me a bunch of accounts and profits be immediately by my prop firm.
Reason? Lagging issue!
Let's just say, I was in a long trade with my all 20 accounts. Seeing that I was wrong with the direction. I used reverse button to exit trade and to also enter short at the same time. At least, that was my intention. Get out of long and get in on short.
Be hold, some of my accounts exited and went short, just as I wanted but, some got lagged behind and still stayed in long position. Even for just a micro second. Since I now had my trade in opposite direction. It was "hedging". Therefore, they closed down my accounts, including the profits I already had made...All forfeited.
Hurts like crazy cuz I wasn't really "hedging".
But rules are rules and so, I blew it.
Point is, whichever copiers you finally decide to stick to, make sure they dont have this type of problem, delaying or lagging. And of course, never, ever touch that reverse button on the DOM.🙄