In trading, net profit is the amount of money an investor or trader has earned after accounting for various expenses and deductions, such as commissions, capital gains tax, and potential losses due to drawdowns. Let's break down each component:

1. Net Profit Calculation:

   • Net Profit = Gross Profit - Total Expenses
   • Gross Profit is the total profit before deducting expenses.
   • Total Expenses include commissions, capital gains tax, and any other trading-related costs.

2. Commission:

   • Commissions are fees paid to brokers for executing trades. They can be a fixed amount per trade or a percentage of the trade value.
   • Deduct commissions from the gross profit to get the net profit.
   • Formula: $\text{Net Profit after Commissions}=\text{Gross Profit}-\text{Total Commissions}$

3. Capital Gains Tax:

   • Capital gains tax is a tax on the profit from the sale of an investment. It is usually a percentage of the capital gain.
   • Deduct capital gains tax from the net profit after commissions.
   • Formula: $\text{Net Profit after Tax}=\text{Net Profit after Commissions}-\text{Capital Gains Tax}$

4. Max Drawdown:

   • Max Drawdown is the maximum loss from a peak to a trough in the trading account's equity curve.
   • Subtract the Max Drawdown from the net profit after tax to get the final net profit.
   • Formula: $\text{Final Net Profit}=\text{Net Profit after Tax}-\text{Max Drawdown}$

It's important to note that these calculations assume that the trader or investor is considering all costs and taxes associated with their trades. Additionally, the order in which these deductions are made may vary depending on the specific tax laws and regulations in the trader's jurisdiction.

Always consult with a financial advisor or tax professional to ensure compliance with local regulations and to get personalized advice based on your specific situation.