Quote from traderdragon2:
If have a simple system with an over 90% win rate.
Flip a coin, buy any stock, no stop, put in a sell limit order 3 cents higher, hold until hit.
Win rate will be well over 90%
Too bad your expectancy will be negative
A beautiful explanation showing win rate is irrelevant to the bottom line, but expectancy is the statistic you want.
This may be why it is extremely difficult to be a winning
retail trader. It may be that retail traders can mostly [only ?]make money with systems that are
low frequency, and that they lose say 8 or 9 out of ten times, but that 1 or 2 times out ten is a grand slam [in other words, invert your system, ie., take lots of small losses, and hang on for the big one].
Notice the relation to game theory. The 3 cent stop gain says that the market is only offering small gains, and offering large drawdowns to get those gains. In other words, it would be interesting to see what the stop loss [bigger stop loss? smaller stop loss? no stop loss?] would be to gain the three cents with positive expentancy. What is the relation to stop gain to stop loss? Is it a mixed strategy? Note that "more risk" and "less risk" are utility functions that is dependent/relative to/on the trader...
It is very difficult to sit through these systems...
nitro