So i have some advices:
1. make sure you are believe in your trading logic
2. record the reason when you open trade
3. take profit and stop loss strictly
4. back to the records when you close trade, and think why you are earning or lossing
5. according to the records , if you find something wrong with your trading logic, fix it
6. add your trade into a trade journal (advice from @GreatArkansas)
7. do the things 1-6 above again
That was good advice but let me add my own opinion.
How about using tools in trading to have easy trading and more reliable when it comes to monitoring the market price.
And also don't rely on this, we should have DYOR in choosing good coins that have the potential to gain profit.