Question about comment handling in mt4

I have an EA comment that I would like only posted on the chart, the first time it is true. Currently it continually repeats.

Anyway the code is like this...


I had it printing too at first, but while the BuySignal is active it prints every tick!! Too much

I would like it to comment on the original first BuySignal and ignore the others until a NEW BuySig is generated or a SellSig is generated.

How do I get it to not repeat an active signal and only post on the first activation of the signal? The way it is right now, it's hard to tell by the comments when the signal was first active since it keeps repeating while active. Also, Do the EA comments get stored in a file somewhere? Because if so, it will eventually take up quite a bit of memory I think.

Once activated (put on), the comment will stay on until cleared or changed i.e. Comment("");
So, you have to decide when you want to take the comment down or change it.
The EA runs by the tick, so you can clear/change it by the next tick, next candle, or set up a timer to clear/change it after a time, or by any other (chart) event.
The comment does not keep a history. It is either current string or none.

you could use a global var
bool PrintComment

Set it to false after the print of the comment and change it to true when there is a new signal

if ((BuySignalA) && ((Ask-Bid) <= AvgSpreadHigh) && PrintComment)
{ Comment(TimeToStr(TimeCurrent(),TIME_SECONDS), " BUY SIGNAL-A >> BUY POSITION SHOULD BE OPENED OR PREVIOUSLY OPENED "); //
PrintComment=false;
Print(TimeToStr(TimeCurrent(),TIME_SECONDS), " BUY SIGNAL-A >> BUY POSITION SHOULD BE OPENED OR PREVIOUSLY OPENED "); }

Check for a change in state:
(uncompiled, untested)