Player_Banker

hi all, read thru some of the posting & noticed that prior to play any shoe, it was recommended to look for biased table? is it using the OR count, so long as its a +OR, we'll take it as a chop, likewise, if its a -OR, it's a streak? but how do we know which & after how many hands then we can determine the type of shoe we gonna play? any advise is appreciated. TY.