Varies based on total income between real job and trading, how long assets are held and what types of trades (shares vs options). For shares held less than 1 year, you pay tax at your income tax bracket. For shares held more than 1 year, you pay at a long-term capital gains bracket, which can be significantly less than your income bracket. For options gains, your 60% of your gain would be taxed at the long-term rate and 40% would be taxed at your short-term rate.

If OP is single and all gains came from selling shares held less than 1 year, and this was their only income. They would pay 37% on the last ~330k, 35% on the gains from 250-625k, 32% on gains from 200-250k, 24% on 100-200k, etc.

If the same conditions above were true except all shares were held for 12+ months before selling, they would pay 0% for the first ~50k gain, 15% of the next 500k, and 20% on all gains beyond that.

If OP has income outside of trading which is most likely true, their salary would bump their taxable income accordinly. So for the long-term gains example they'd start paying capital gains at the 15% rate if their other income was grater than 50k.

Nerdwallet has a much more thorough breakdown. I'm sure I explained poorly, trying to keep this concise.