A lot of traders however gamble and they call it scalping. They have no single strategy and all they just do is to buy the lows and expect a rise and in a case where the market keeps dropping further, emotion kicks in.
This is not as bad as it sounds, though having a bot for placing orders is certainly a preferred way of scalping. Doing it the manual way is very exhausting and time consuming, so I can't really imagine a human being practicing this approach regularly. The strategy in this case is very simple in its premises. You just have to follow the trend and place stop-losses and take-profits accordingly. In the end, it doesn't matter how many losing trades you make as long as your net financial result remains positive.
Of course, in real life it is not that simple as simple bots get massively exploited by more advanced bots and the latter by truly sophisticated ones, leaving the owners of the simpler bots with losses in the long run. But it is definitely doable if you have enough experience in the required fields, that is in trading itself and in writing trading bots.