Every trader knows trading is a probability game. However, very few can internalize and live by the true meaning of what it means to be a probability game.

Mark Douglas, the author of “Trading in the Zone”, explains it well.     Someone who masters the probability game produces uncertain outcome but consistent result.   The best example to illustrate this concept is the casino business.     The casino holds on the average 4.5% probability advantage over the player. It does not know whether the next hand will be a winner or a loser against the player, but the casino is certain that they always win given enough bets.     Therefore casinos do not care if a player is going through a winning streak, as long as he is not cheating.

That’s exactly how traders need to think about his trades.    Market is random.    Anything can happen to the current trade.   A trader can increase his probability of winning either through fundamental or technical analysis but the best analysis can never produce a 100% certainty.  In reality, the highest win rate that the best analysis can produce is far from 100%.   However,  as long as the trader has a trading plan that can produce positive expected value,  he can expect consistent result over a reasonably large number of trades,  just like the casino. (more…)