If we talk about the strategy, it takes me about a month to evaluate its performance. At the same time, most often I test it on a demo, plus I evaluate how well it has worked in the past. During this time, I test it on various assets in order to understand which ones it is best suited for. If we are talking about some automated earning system, it seems to me that it takes at least a year, although it is relative, we change strategies periodically, because the market throws up new regularities and everything changes, so here and there. That is, today the system can be quite working, and in 2021 it will lose all sense. What if you don't have time to catch the moment when it happens and you lose your capital?