DislikedIt is about not knowing which trade (and position in MT4) to take first.Ignored
in MT4 you open a long position of x lots with s/l and t/p, a few minutes later you additionally open a short position of y lots with another s/l and another t/p
in MT5 you would have bought x lots and place two OCO pending sell orders of x lots as your s/l and t/p of the first trade. Then a few minutes later you would have sold y lots and place two pending OCO buy orders of y lots (representing the second trade's s/l and t/p).
Now you are long with a total of x-y lots (or short y-x lots if the second trade was bigger, or flat if they were equal)
Lets assume you are now flat because both trades were equal size. Being flat perfectly represents the state you are in: you don't know what will happen next. But you still have some pending orders around, a buy limit below (that was the t/p of the second trade) and a sell limit above (that was the t/p of the first trade). If it would have t/p 'd both trades in MT4 (no matter which one first) this would mean that in MT5 it will first hit one of the limit orders and then the other to close it again, if one of the MT4 trades had hit s/l this would mean in MT5 it first hit one of the limit orders and then the stop order behind it (or if the stops were tighter first the stop and then the limit behind it or in the worst case both stop orders hit).
No matter how complicated the MT4 example may be, you will always be able to replicate it exactly with MT5. Thats why i think such an indicator would be useful to actually show you how this would have been done in MT5, let it analyze your trading (historic and real time) and plot right into the chart where you are (or have been) long, short or flat and what kind and size of limit and stop orders you would have placed to achieve this same result in MT5.