[amibroker] exrem(array1,array2) please elaborate it?

[rink <boyrinku@xxxxxxxxxxx>]

Hello everybody
please elaborate in simple english what is this formula?
i read help file but cant understand it
says removes excessive signals:
returns 1 on the first occurence of "true" signal in Array1
then returns 0 until Array2 is true even if there are "true" signals in 
Array1


in this formula i see this
Buy = H > Ref(HHV(H,200),-1);
BuyPrice = Ref(HHV(H,200),-1);
Sell = L < Ref(LLV(L,100),-1);
SellPrice = Ref(LLV(L,100),-1);

Buy = ExRem(Buy,Sell);
Sell = ExRem(Sell,Buy);

Short = L < Ref(LLV(L,200),-1);
ShortPrice = Ref(LLV(L,200),-1);
Cover = H > Ref(HHV(H,100),-1);
CoverPrice = Ref(HHV(H,100),-1);




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