Exit Points During Trading

hi everyone. A little help pls with my trading problem.

If you are on the under 3.5 in a match but an early goal goes in. What would your reaction be? Waiting and hope there is not a 2nd early goal. or trade with a loss immediately after an early goal.

Another thingy I've noticed. When prices are getting real low there is a huge amount of money to be backed. So there are some big fish that are laying at very low odds with a huge amount. More profitable and less risky this way.

So let me know your way of work or let's share some ideas.