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发表于 2009-10-13 09:57 PM
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本帖最后由 oldfairy 于 2009-10-13 22:59 编辑
any system, as long as it has 50% winning rate and you really follow principles
suppose 2% stop loss (in his systems) and 4% winning stop (I just use this number, you could pick number and backtest till you find one suitable system)
your money X (1+4%)^nX(1-2%)^n
then you know you must make money with this system theoratically.
if you have 3 different systems, they are not related with each other at all and winning rate could beat 50% when you backtest index (but not individual stocks) several years.
You could see that they suppose to bring you money with the calculation above. When 3 are totally seperated, they should work at diifferent time period and they might make your account (totally account) rise relative steady.
If you only use one system, it might work last 5 year, next 3 year, but it might not work this whole year and you might feel very upset and give it up.
The key, Cobra said it already, stick with the mechanic system (no feeling, so call it mechanic). Win a little bigger than lose. With time, you might see the account changed a lot.
3# xiaoht |
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