[amibroker] Difference between Exrem and Flip

["booker_1324" <booker_1324@xxxxxxxxx>]

Could someone please take the time and explain the difference between 
Exrem and Flip.

buy = ExRem( buy, sell );
sell = ExRem( sell, buy ); 

and 

buy = Flip( buy, sell );
sell = Flip( sell, buy ); 

I can understand what Exrem does, but after reading the help on Flip 
where it says "this essentially reverts the process of ExRem - multiple 
signals are back again", how can mutiple signals happen? If it acts as 
a latch, and a buy state occurs, would not this prevent another buy 
until a sell occured? If this is true then isn't this the same as Exrem.


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