Risk management
Get it right, and you can survive a string of losses while still growing your account. Get it wrong, and one bad trade can set you back months. Most blown-up accounts are not the result of bad stock picks — they are the result of bad position sizing.
Position sizing is the process of determining how much capital to allocate to a single trade. It is not about picking stocks or timing entries — it is about controlling how much you stand to lose if the trade goes against you. A good method keeps each trade’s potential loss small relative to your total account so no single trade can cause serious damage.
The most widely used guideline among professional traders is the 1–2% rule: never risk more than 1–2% of your total account on any single trade. If you have a $25,000 account and use 1%, you should never risk more than $250 on a single trade. That $250 is your maximum acceptable loss — not the notional size of your position.
Risk amount by account size (illustrative).
| Account size | 1% risk | 2% risk |
|---|---|---|
| $10,000 | $100 | $200 |
| $25,000 | $250 | $500 |
| $50,000 | $500 | $1,000 |
| $100,000 | $1,000 | $2,000 |
Once you know your risk amount, use: Shares = Risk amount ÷ (Entry price − Stop-loss price). The denominator is risk per share — the distance to your invalidation point.
You have a $50,000 account and risk 1% ($500). You buy at $100 with a stop at $95. Risk per share is $5. Shares = $500 ÷ $5 = 100 shares. Notional position ≈ $10,000 (20% of the account), but risk is $500 (1%).
Same account, same $500 risk. Stock at $50, stop at $42 — risk per share $8. Shares = $500 ÷ $8 ≈ 62. A wider stop automatically reduces share count; the formula is doing its job.
Stock at $200, stop at $197 — $3 risk per share. Shares = $500 ÷ $3 ≈ 166; notional can be a large fraction of the account. That may be mathematically consistent but introduces concentration risk — many traders add a cap (for example 20–25% of equity) per name.
A winning streak boosts confidence — then risk creeps to 5–10% per trade. One or two losses erase weeks of gains. Keep the same percentage regardless of recent results.
Buying the same dollar notional in every name ignores how far price can move against you. The formula naturally adjusts: wider stops imply fewer shares.
Without a stop, sizing is meaningless — you cannot compute risk per share. Define the invalidation level first, then size.
If you risk $500, many traders look for targets where reward is a multiple of that risk (for example 1:2). Position sizing keeps you alive long enough for a statistical edge to matter — it does not replace a strategy, but it keeps you in the game.
Position sizing is not glamorous, but it keeps you in the game. Start from risk amount and stop distance — then map execution to your broker. TradingSignalNow shows direction and levels in a desk-style row; you remain responsible for size, stops, and compliance with your broker and local rules. This article is educational, not personal advice.
Educational content only. Not investment advice. Trading involves substantial risk of loss.