What is position sizing and why is it critical?

Position sizing determines how much capital you allocate to each trade. It's the most critical aspect of risk management because it controls how much you can lose on any single trade. Proper position sizing ensures that a series of losses won't devastate your account, allowing you to survive long enough to become profitable.

How do I use the position size calculator?

Enter your total account balance, your risk percentage (how much you're willing to lose), your planned entry price, and your stop loss price. The calculator will show you the exact dollar amount at risk, the total position size in dollars, and the number of units or shares to trade. Always verify the calculation matches your broker's requirements.

What risk percentage should I use?

Most professional traders risk 1-2% of their account per trade. Beginners should start with 0.5-1% until they develop consistent profitability. Never risk more than 2% on a single trade. If you risk 2% per trade, you can survive 50 consecutive losses before your account is depleted, giving you ample opportunity to refine your strategy.

What's the difference between position size and lot size?

Position size is the total dollar value of your trade, while lot size (in forex) refers to the number of currency units. In stocks, position size is the number of shares times the share price. The position size calculator helps you determine the dollar amount, which you then convert to lots or shares based on your market and broker specifications.

Should I adjust position size based on confidence?

No. One of the biggest mistakes traders make is increasing position size when they feel confident about a trade. Maintain consistent risk percentage across all trades. Your edge comes from your strategy over many trades, not from predicting which individual trades will win. Consistency is key to long-term success.

How does position sizing relate to stop loss placement?

Position size and stop loss work together. A wider stop loss (further from entry) requires a smaller position size to maintain the same dollar risk. A tighter stop loss allows for a larger position size. Never adjust your stop loss to accommodate a desired position size — always place your stop at a logical technical level first, then calculate position size accordingly.

Position Size Calculator

Calculate Your Position Size

Determine optimal trade size based on your risk tolerance

Account Balance ($)

Risk Percentage (%)

Entry Price

Stop Loss Price

Risk Management

Position sizing is crucial for protecting your capital. Most professional traders risk only 1-2% of their account per trade to ensure long-term survival.

Consistency is Key

Using consistent position sizing helps you maintain emotional control and prevents devastating losses that can wipe out your account.

Calculate Your Position Size

Risk Management

Consistency is Key

Frequently Asked Questions