PokerTracker Dependency?

[Black winter day]

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Unless I was 4-tabling live, no.

PT helps those of us who 4-table and want an "insta-read" of a player.

Live players can examine each individual more because there are fewer hands/hour.

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Exactly.
The few times i play live, it's usually a full table instead of 4x6max online.Usually, the table stays pretty much the same.
So, i can remember all the players at my live table.
I cannot do it 4tabling online, when players come and go.