How long do you consider a strategy is successful

Hi all, just want hear from you guy how long do you consider your strategy is successful. Example if you gain profit for the past 6mth using a method or system or a set of rule, do you consider it as a successful strategy? I know most people will trade mini or micro lot at the beginning, so how will you know that you are ready to go for a standard. Let's share your experience. Thanks.

I start trading new systems with minis. Once I've made enough profits from that specific system to afford a standard, I let the system pay for the standard lot size margin and risk. So (for me), it's not about how much time the system needs to be successful, but about how profitable the system is and when it can pay for itself to be super-sized :-)

Good question. I've been testing a strategy which has been profitable for the last six months. Seems promising, however I'm wary of declaring the strategy a success because the next 8 months could all be losers. How different is a profitable month to a profitable trade? And how many months or how many trades do you have to count before you can declare a system a success? Sorry, I don't know.

The strategy is good if it gives you maoney, sometimes i get my money after 2 weeks , sometimes it comes after 2 mins, so you just need to wait!

Drop the concept of time, and adopt the concept of statistics.

Statistics will tell you whether a strategy is (still) successfull (i.e. has an edge) or not.

What do you mean under "concept of time" and "concept of statistics" ?

every strategy has a win/lose percentage. back test/forward test and get statistics.

was this strategy better in 2000? how did it do in 2010? if in 2000 you won 90% of the time and in 2010 you only won 50% of the time you know that this strategy is not as effective anymore.

for example, the turtle traders used a breakout strategy based on a 20 day high. back in those days, the strategy is awesome. if you apply the same rules today, the outcome is much worse that even a MA crossover produces better results.

there are some strategies that are evergreen. that means regardless how much time passes, the strategy is still the same and it still delivers the same results. one of them that i know of is called price action. learn it, live it. it's reliability has not changed since technical analysis became popular.