[soVeryTired]

Texas hold'em is straightforward to calculate odds for. There are 52 cards in the deck. Two are in your hand, and after the flop three are on the table, leaving 47 unknowns. That means if you have N outs (cards that will improve your hand), the chance of hitting one on the turn is N/47, which is about 2N per cent. Likewise the chance of hitting by the river is about 4N%.

The hard part is calculating the implied odds: there you need to play out scenarios of what your opponent might hold, and what cards would cause them to bet or call with a losing hand.

Tells are overrated in poker. It's all about implied odds and grinding it out.