To earn money trading forex, a trader makes a bet or places a trade in the direction they believe the chart’s price will rise or fall to. If the trader speculates right, they earn profit, if not they lose the money they risked.
Quick tips
Your lot size is essentially how much you are betting on a particular trade
A Buy or long position means you believe the chart’s price will rise
A Sell or short position means you believe the chart’s price will fall