I need someone explain this type of block function

[Steven_]

I need someone explain on this check type block function. This function i think might useful for me to trace previous closed trade, but i dont know how to use it, what mean by "allow block to pass max. 1 time for each trade that was found". How to use it, can give me example?

[l'andorrà]

I remember asking that to the admin and he replied it is a fossil from previous fxDreema versions that he's too lazy to remove. Simply ignore it. You can use a pink 'once per tade' block instead.