Position Risk Graph
Example Data Table
| Account | Risk % | Entry | Stop | Risk/Share | Shares |
|---|---|---|---|---|---|
| $10,000 | 1% | $50 | $48 | $2 | 50 |
| $25,000 | 1.5% | $80 | $76 | $4 | 93 |
| $5,000 | 2% | $20 | $19 | $1 | 100 |
Formula Used
Risk Amount = Account Size × Risk Percentage ÷ 100
Risk Per Share = Absolute Entry Price − Stop Loss Price + Slippage
Shares = Floor((Risk Amount − Commission) ÷ Risk Per Share)
Position Value = Shares × Entry Price
Reward Risk Ratio = Potential Profit ÷ Potential Loss
How to Use This Calculator
Enter your account size first. Add the percentage you want to risk on one trade. Then enter the planned entry price, stop loss price, and target price. Add estimated commission and slippage. Press the calculate button. The result shows the suggested share quantity, total exposure, possible loss, possible profit, and reward risk ratio.
Article: Why Position Size Matters
Risk Comes First
Position sizing protects trading capital. It tells you how many shares to buy. The goal is simple. You should know the loss before entering a trade. This keeps emotions lower. It also helps avoid oversized trades.
Better Trade Control
A stock may look attractive. Still, the trade can be unsafe if the stop loss is too wide. This calculator connects the entry price with the stop price. It then finds share size based on your chosen risk. The method supports cleaner decisions.
Capital Exposure
Position value shows how much money enters the trade. A trade may have low risk but high exposure. That can affect cash flow. It may also limit other opportunities. Traders should review both risk and capital used.
Reward Planning
The target price helps measure possible profit. The calculator compares reward with possible loss. A higher reward risk ratio can support stronger planning. It does not guarantee success. It only shows whether the setup offers enough reward for the risk.
Slippage and Fees
Real trades include costs. Commission and slippage reduce accuracy if ignored. Slippage can happen in fast markets. It is useful to add a small estimate. This gives a more careful share size.
Consistent Method
Good trading needs repeatable rules. Position sizing is one of those rules. It prevents random share choices. It also helps compare different trades. A fixed risk approach makes performance easier to review.
Practical Use
Use this tool before placing an order. Adjust the stop loss and target. Watch how the share size changes. A tighter stop may increase shares. A wider stop lowers shares. This helps match the trade with your risk plan.
FAQs
What is stock position sizing?
It is the process of deciding how many shares to buy based on account size, entry price, stop loss, and risk limit.
Why is risk percentage important?
Risk percentage limits how much capital can be lost on one trade. It helps protect the account from large drawdowns.
Can this calculator guarantee profit?
No. It only helps manage risk and estimate trade size. Market movement can still create losses.
What is risk per share?
Risk per share is the difference between entry price and stop loss price, plus estimated slippage.
Why include commission?
Commission reduces net profit and increases total trade cost. Including it gives a more realistic result.
What is reward risk ratio?
It compares possible profit with possible loss. A ratio of 2 means the reward is twice the risk.
Should I always risk one percent?
Not always. One percent is common, but traders should choose risk based on strategy, experience, and account tolerance.
Can I use it for short trades?
Yes. Use the same values. The calculator uses absolute price difference, so it can estimate risk for long or short trades.