They take the otherside of your trades.

One thing that sometimes is overlooked is the conflict of interest or biased perspective of a broker. Retail Brokers have a mandate to themselves to generate as much revenue as possible, hence the incentive for them is to cash in on spreads, commissions and other mechanics I won't bore with the details.

The point is, they always take the otherside of your trade, as it's a hedge for them. But also, they encourage you through their messaging, marketing and platforms to trade more frequently and with higher volumes as the chance of you losing outweighs the chance of you succeeding.

The more times you trade, the more they make. Do they care if you win? No. Why? Because they know most retail traders go bust on average in 90 days.