Livermore's buying method
1. Buy 20% as the base position
2. If you buy wrong, stop loss immediately when it drops 10%, and lose 2% of the total position
3. If you buy right, add 20% for every 10% increase, and add 40% for the last time.
4. Hold as long as it does not fall below 10%, and sell all the positions immediately once it falls below 10%