Every trader has their preference of assets to scalp. The most basic approach would be to track the developments in these markets and follow relevant news affecting the stock's price or forex. After this, a trader can gauge the nature of movement and take a necessary position after looking at the various indicators at his disposal. The scalper should already have a defined strategy to scalp and would need to assess whether the asset would behave in a way that would make the scalping trade profitable. For traders whose primary strategy is scalping, it could be a more strenuous effect to determine which asset to scalp numerous times in a day.