Thinking about how trading strategies need to always be changed and how one strategy may not work for a long time, what do you do with the strategy that you are about to change. do you just forget about it completely once a new strategy starts working for you? or do you keep it in remembrance for the future. If you have experienced this before; has any old trading strategy that you decided to apply work for you? Is it possible that old strategies may work in the future again?
If the surrounding situation is right compared to the strategy then yes definitely the old strategy can be useful in trading. But most of the time strategy has to be changed with time interval because world economy is not go through the same all the time or whole market condition is not same as it is not stable so strategy has to be changed with time. So I think it's never wise to sleep on a strategy, it's a smart trader's job to analyze the need over time or stay active.