How do traders make money?

How do traders make money?
Day traders make money by buying stock, commodities, currencies or other trade-able securities and holding them for a short period of time – anywhere from a few minutes to a few hours – before selling them off again. ... The focus is on profiting from short-term price fluctuations.

Reference:
Average Rate of Return for Day Traders - Investopedia
May 8, 2019

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