Most new traders overtrade.
Overtrading is when you (hoping to receive the maximum possible profit) opens a huge position consisting of multiple lots.
Considering the typical market activity, it’s easy to lose half or even all your trading capital.
This problem is sometimes directly connected to insufficient trading capital.
But it’s more likely due to the trader lacking knowledge of money management principles, which means lack of competence to control their trading capital properly.
Your trading capital is used to earn money. You should treat each rupee is like a newborn baby.
Your first and foremost responsibility is to protect it. If you lose it, you have less to help you earn money.