Most intraday traders lose money. This is because they trade without a plan, without a strategy.
Many don't use stop losses. Often, they commit large amounts of capital in a single trade. In such situations, a single bad trade takes a big bite out of their trading capital which is hard to earn back.
To make consistent profits in intraday trading, you need to follow a sound trading strategy. This strategy should be built upon a good grounding in the fundamentals of technical analysis.
It will require some trial and error on your part. It will take some time. But once you have a winning trading strategy, intra-day trading will become profitable.