My No.1 trading rule

Out of so many trading rules advise from my dad, I like the most is don't hold high variable share (up and down many within one day).

This is because we don't know when is high peak and low peak. Besides, we also unsure on their share background details.

If we blind buy it with all our modal, all our modal will stuck at there when we don't sell at high peak and hold at low peak.

Now it become my No.1 trading rule!