1870's stock market reflection

The tip I think most affected me in the stock market activity was buy low sell high. I chose this tip because I made all my money from buying low and then selling high. First of all I bought a railroads share for 5$ and managed to sell it for 20$ which is 4 times what I bought it for. The other stock I bought was silver. I bought it for 3$ a share and sold it for 10$ a share which is 3 and a bit times the amount I bought it for. As you can see from what I bought and sold the tip buy low and sell high really helped me in particular.