There was one simple thing that Saul said in the discussion around my portfolio review that really resonated with me. I 'm para phrasing here. Saul said that if you are studying companies, then presumably you are able to determine if stocks you hold are working or not, and whether stock A offers a better risk - reward tradeoff compared to stock B. Once you have made an assessment, you can follow through on your assessment. The point of portfolio review would be lost if after determining what wasn’t working one didn’t do anything.
If you follow this strategy, I can say with high conviction that you will not be successful in the long run. I cannot say this a 100%, but very few people do this successfully. Saul is one of them. You cannot predict how your stocks will behave. There are always periods when stocks perform really badly and then suddenly they will turn. INFN is an example. TSLA is the other way round. So your approach above will essentially mean, you buy TSLA, ride the stock from 30 to 290 and then jump into INFN just before it starts going up.
I can most certainly say, it will not work. It is your money and you need to make the right decisions with it. So I am not going to convince you one way or another.
There is another poster by the handle huddaman. He does this all the time I think. You should check with him to see how he is doing with this strategy.
Vish