Well there are different things you should learn and for sure most of the members will give it to you but for me when I start to make trade these are my considerations.
1. Identify the coin which is suitable for your trading.
2. Find a good exchange which secured.
Before starting trading.
1. Learn what is candlestick
2. Learn the candlestick pattern
3. Use technical indicators
Such as:
3.1 Moving Average Channel (MAC)
3.2 Moving Average Converge Divergence (MACD)
3.3 RSI, these are just examples
I created a thread about MACD
https://bitcointalk.org/index.php?topic=5255303.0 you can check this too
4. Keep updated on the news about the coin mostly those are the cause of the event of the pump or dump.
5. Funds this is the most important
"Don't trade that you cant afford"