Reaction based crosshair placement - Daily CS Tips & Tricks, Part 4
The ending isn't as clear as I wanted it to be. I wanted to explain that as you are focusing on your crosshair placement throughout games, and if you react when people have already past your crosshair (wider angle than you're holding), then hold the angle by moving your crosshair a bit opposite of the opening. So leave more space between your crosshair and the opening angle.