Compounding means later returns are calculated on a changed balance. Withdrawals remove money from that balance, while reinvested profits increase it. The Investor.gov explanation of compound interest introduces the basic mathematics. Trading differs from fixed-interest examples because returns are uncertain and can be negative.
Follow the money in order
Start with the opening balance, calculate gross profit or loss, subtract modeled charges, apply reinvestment and then account for withdrawals. In TradeCalcZen’s trading mode, the gross daily return applies to capital, not to the leveraged position. Leverage can still increase percentage-based brokerage because it increases modeled position value.
Two hypothetical trading days
Start with ₹10,000, assume a 1% daily gross return, no charges and full reinvestment. After day one the balance is ₹10,100. Withdraw ₹50 and the next day starts with ₹10,050. Day two produces ₹100.50; after another ₹50 withdrawal the balance is ₹10,100.50.
Without withdrawals, the same mathematical scenario ends at ₹10,201. With withdrawals you hold ₹10,100.50 in the account plus ₹100 withdrawn: ₹10,200.50 combined. The ₹0.50 difference is growth not earned on the first withdrawn ₹50. Neither scenario is a forecast or a sustainable daily-return assumption.
Set up a useful scenario
- Enter your initial capital and a clearly hypothetical return.
- Include the applicable modeled brokerage and GST; understand that these are not every trading cost.
- Choose the schedule, reinvestment percentage and withdrawal amount.
- Use daily or selected-weekday withdrawals and inspect the dated ledger.
- Read ending capital and cumulative withdrawals separately to avoid double-counting money.
Test downside as well as growth
A constant-return model does not simulate a realistic mix of winning and losing days. Run a negative-rate scenario to inspect depletion. For example, a 2% loss on ₹10,000 leaves ₹9,800 before any withdrawal or charge. Taking ₹50 out then leaves ₹9,750 for later periods.
Withdrawals may consume principal when profit is insufficient. Less than full reinvestment also removes some profit from future compounding, so check both controls together. An impressive line chart does not establish a trading edge, account for every tax or predict future income.
More guides
- How to Calculate Position Size
- Indian Trading Charges Explained
- Risk Reward Ratio and Break-Even Win Rate
- Why Trading Losses Need Larger Recovery Gains
Educational examples only, not personalized investment or tax advice. See our disclaimer and editorial standards. Report a correction.