Before entering trade, check the following:
Trend: Is the market generally going up, down, or sideways?
Support and resistance: Where has price previously reacted?
Entry signal: Do you have a clear reason to enter?
Risk-to-reward: Is the potential profit worth the amount you're risking?
Stop-loss: Where will you exit if the trade goes against you?
Take-profit: Where will you take your profit?
News/events: Important economic or company news can cause large price movements.
Your trading plan: Does the trade actually meet your rules?
Simple rule: Don't enter just because the price is moving. Have a clear setup.