Hello Jie!
Glad to hear you were doing such a good job over the months! You are welcome, I will do my best to keep up the work, and update the courses with better and better EAs.
Yes, my testing over the years showed that we should be more concentrated on the recent week or two. And there is no precise solution to that. What you need to accept is a trader is that the market changes. I know you know that everyone knows that. But at the same time, everyone looks for the strategy that will work consistently over time.
Same when we trade with Expert Advisors. We want to find this best period to test the EAs, this best acceptance criteria, and this best method to filter the strategies which we can use in time. But again, the market changes. So it is really all about testing and testing, and if you find now that looking at the last week will bring you better results, that might not be the best after a couple of months.
So what you are doing is just great, keep it up, always have in mind to look for the better and better solution. This way you will go with the market.