$Microsoft(MSFT.US) I started building a position from 470 last November, buying in batches at 450, 420, 400, 380, and 360. The buy order at 350 didn't get filled. In the end, I still have 13% cash left.

Reviewing my own trades, I have two takeaways:

1. I basically followed the plan. I got a bit panicked when the price kept dropping and didn't dare to buy much, so I just set limit orders to execute automatically at certain points. I even canceled a few orders out of fear in the middle. Later, I placed the buy orders again. Now I kind of regret not using up all my bullets. (Probably would have regretted not using leverage if I had used them all)

2. I lacked long-term thinking. I bought MSFT at 360 before, sold it at 380 for a tiny profit, and then it kept soaring. I could only invest in other stocks, which not only didn't make me money but also caused a small loss (that was another reckless move). By the time I got back in, the price was already at a high of 470. Classic case of selling low and buying high.

Now I've just broken even, and there's a voice in my head telling me to sell quickly.

Conclusion: The biggest enemy in stock trading is oneself.