Equities Trading: Strategy, Orders, and Risk Management

Position sizing first, then strategy: the math, the order types and the risk rules that keep a trading account alive.

By Michael Hewitt, Founder & Editor-in-Chief. Updated September 29, 2026.

Do the math before you pick a strategy. A $50,000 account risking 1% a trade can lose $500 on any position. Buy at $100 with a $95 stop and you risk $5 a share, so the position is 100 shares ($10,000). Ten straight losses at that size cost about 10% of the account. Most retail traders lose money; the ones who survive trade on written rules, and this is the first.

Position Sizing: The Math That Keeps You Alive

The formula: Position Size = (Account × Risk%) ÷ (Entry Price - Stop Price). Widen the stop to $90 and the same $500 buys 50 shares.

The 1% is a plan, not a floor. A stop-loss becomes a market order when touched, so a stock that closes at $97 and opens at $88 fills your $95 stop near $88: $1,200 lost on 100 shares, 2.4% of the account. Check the earnings date before you enter.

• Never let position size exceed 20% of total account, even if math allows, to limit concentration risk.
• After 3 consecutive losses, cut position size in half until you have a winner.
• Track win rate AND reward-to-risk: at 40% wins and 3:1, ten trades net +6 units; at 70% wins and 1:3, they net -2.

Risk Management: The Only Thing That Matters Long-Term

No strategy works if a few bad trades wipe out your account. Risk management is the difference between traders who survive and those who do not.

• Never risk more than 1-2% of your account on a single trade.
• Always set a stop loss before entering a trade, at a level where the thesis is proven wrong.
• Target a minimum 2:1 reward-to-risk ratio on every setup.
• Keep a trading journal (setup, entry, exit, outcome, lessons) and review it monthly to find what is working.

Define Your Strategy Before You Trade

Pick one style, write down its entry, exit and risk rules, and trade only that until your journal shows whether it works.

• Swing trading: hold days to weeks based on technical patterns and momentum.
• Trend following: ride established up- or down-trends until they break.
• Mean reversion: buy oversold, sell overbought; works well in range-bound markets.
• Position trading: longer holds of weeks to months based on macro or sector themes.

Order Types That Matter

• Market order: buys or sells immediately at the current price. Fast but can slip in volatile markets.
• Limit order: only executes at your chosen price or better. Slower but prevents overpaying.
• Stop-loss order: automatically sells if price drops to your set level; essential for risk control.
• Stop-limit order: combines a stop trigger with a limit price to prevent bad fills in fast moves, but may not fill if the price gaps through the limit.
• Trailing stop: follows price up and locks in gains automatically.

Common Trader Mistakes That Drain Accounts

• Revenge trading: trying to win back losses by sizing up. Locks in the worst sequence of trades.
• Moving stop losses further away to avoid being stopped out, which turns small losses into account-killers.
• Adding to losing positions ('averaging down') without a defined plan: it works until it doesn't, then takes you out.
• Trading too many setups: every strategy works in some market regime, none work in all of them.
• Ignoring commissions and slippage on small accounts: $7 in round-trip costs is 1.4% of a $500 trade.
• Not separating trading capital from living expenses: the moment you NEED to make money, you stop trading well.

Key Takeaways

• Size every trade from its stop: $500 of risk with a $5 stop is 100 shares.
• Risk 1-2% per trade at most, with the stop set before you enter.
• Judge a strategy on win rate and reward-to-risk together, aiming for at least 2:1.
• Keep most of your net worth invested, not traded.