Send it is the language of commitment, borrowed from action sports. In trading rooms it is used both for a well-rehearsed entry taken without flinching and for a reckless click, and the tone rarely distinguishes them.
The distinction that matters is what happened before the click. Decisiveness on a pre-planned setup is a skill worth developing, and it is the cure for hesitation. Decisiveness on an unplanned one is just speed, and speed is not an edge.
Related: hesitation, ape-in, chasing, yolo