With little research and understanding I actually had the guts to buy a stock (Jimei 1159.hk) I knew little about. Bought yesterday late afternoon and was stopped out this morning when the market opened.
Total damage - (2.22 - 1.98) x 500 shares = hkd 122 = S$22
Lessons
1. Study the stock more before buying - don't just trust your system
2. Check ask and bid before committing - Google finance is 15 minutes
3. Know the daily trading range of the stock to avoid being stopped out - the price is now 2.14. Refer to point 1.
4. Having a stop loss works to avoid stupid mistakes like these if lessons 1 to 4 are learnt
5. Investing small amounts in the real market teaches more effectively than learning from pure paper trades