The 3 5 7 Rule of Trading
A position sizing and risk management framework that allocates capital across three different trade types based on conviction levels. It guides traders to risk different percentages on short-term, medium-term, and long-term positions.
In depth
The 3 5 7 rule is a tactical position sizing system designed to match your capital allocation with your confidence in each trade setup. The numbers represent percentage allocations: 3% risk on short-term trades, 5% on medium-term positions, and 7% on long-term holdings. This tiered approach acknowledges that different timeframes and setups warrant different risk exposures.
The framework operates on the principle that conviction varies by trade type. A swing trade with multiple technical confirmations might justify 5% risk. A quick scalp with less confirmation warrants only 3%. A core position based on fundamental analysis and long-term trends could support 7% risk. Rather than using fixed position sizes, traders adjust their stake based on how confident they are in the trade's probability of success.
Implementing the 3 5 7 rule requires discipline and pre-trade planning. Before entering any position, you must classify it into one of the three categories. Then calculate your position size so that a stop-loss hit results in exactly that percentage loss. For example, if your account is $10,000 and you're taking a medium-term trade, your maximum loss should be $500 (5%). This backward calculation from acceptable loss ensures consistent risk management regardless of market conditions.
Why it matters
Most retail traders fail because they use inconsistent position sizing. They risk 1% on some trades and 8% on others, creating unpredictable portfolio volatility. The 3 5 7 rule eliminates this guesswork by providing clear allocation guidelines. It prevents over-leveraging high-conviction trades while discouraging under-sizing legitimate setups.
This framework also protects against emotional decision-making. When you've predetermined your risk based on the trade's characteristics, you're less likely to add to losing positions or panic-sell winners. The rule creates psychological anchors that keep your risk-reward ratios intact even during volatile market periods.
TraderLog's position sizing calculator integrates directly with the 3 5 7 framework. You can tag each trade as short-term, medium-term, or long-term, and the platform automatically calculates ideal position sizes based on your account equity and stop-loss levels. This removes math errors from the planning process.
Your TraderLog journal captures the actual results from each trade category. Over time, you'll identify which timeframe genuinely produces your best risk-adjusted returns. You might discover your 7% long-term trades underperform while your 5% swing trades excel. This data-driven feedback loop lets you refine the percentages to match your personal strengths and market conditions.
Frequently asked questions
Yes. These numbers are starting guidelines, not rules carved in stone. If your account size is small or your volatility tolerance is low, try 1%, 2%, 3% instead. The principle—matching risk to timeframe and conviction—matters more than exact percentages.
Skip that trade. If your technical setup doesn't allow a reasonable stop-loss distance, the risk-reward ratio is poor regardless. The 3 5 7 rule prevents you from forcing trades into a fixed system.
Absolutely. Classify each position by timeframe intent, then calculate position size independently for forex, stocks, or futures. The rule scales across any market because it's based on percentage risk, not absolute dollars.
Track The 3 5 7 Rule of Trading in your trading journal.
TraderLog calculates The 3 5 7 Rule of Trading automatically across your trade history, and shows you exactly when and why it changes.