I will share my approach on TSLA. It's easy to implement and worked well for me in the past. This "Holding + Trading" approach prevents me from buying high and selling low. 90% for long term investment. Buy and hold only, I expect many fold gain in the next 15 years. 20% for trading. It's for fun, and to give some hard time to the stock manipulators, AI trading programs, etc. Long time ago I realized if I buy high sell low, I would be helping the shorts. For trading, I mainly buy low sell high. I don't struggle to predict what the stock will do next. I can be patient and don't worry about missing the next rally, because I have at least 90% on the long side even if my trading portion stayed in cash all the time. Because I am relaxed, I tend to get really good deals. Also, if I buy low, I can be patient to see how high it will go. For the trading portion, I buy shares and options in steps when the stock drops, about 5% for each step. For example, this is roughly what I did in this round. I still have most of the positions. +5% in shares @$200 +5% in shares @$190 +5% in 2019 Leaps when stock dropped below $185 +5% in Call Options when it dropped to $180 My overall allocation should be viewed as very aggressive, and it may not be suitable for everyone. This can be modify to be less aggressive. Pick an allocation that works for you.