Scalping
Scalping is a style where you catch small price moves and hold a trade from seconds to a few minutes. There are many trades, and profit and loss on each one are small.
So the main price here is not the idea but the costs: spread, commission and slippage. Over a short distance they eat a visible part of the result.
Example
You take 5 pips of profit and the spread on the pair is 1.5 pips. A slice of the move is gone before you even enter. Do 40 trades like that in a day and the costs add up to a big sum.
What not to do
Do not scalp during news releases or with a wide spread. Do not raise leverage to squeeze more from a small move. After a losing streak stop for the day instead of trying to win it back.
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