First the first question you need to ask yourself is, where does the money I earn come from, or, where does the money I lose in the financial markets come from.
People make us believe that the market moves based on supply and demand when this is totally false. On the contrary, the market rises when there are many sellers and Shiites when there are many buyers.
Of a truth we need to take note of this things basically cause they mattter in every way in making us successful in trading but the first thing is having ground knowledge about the markets and how it flows, then I'm trying to understand that we are the liquidity because we tend to buy and sell and this patterns changes the price thereby causing liquidity, so being a successful trader isn't an easy task because you have to be ready to face anything that comes in.