How Should I Combine Trend Following with Risk Management and Position Sizing?

Trend following identifies the trade. Risk management and position sizing make it work.

You can have the world's best trend following strategy, but if your position sizing is random, you blow up. You can have perfect position sizing but no risk management, and one bad trade destroys you. All three must work together.

The complete system framework:

Step 1: Identify the trend (using moving averages or Donchian channels) Step 2: Wait for an entry (breakout, support bounce, or trend confirmation) Step 3: Set your stop loss (using support/resistance + ATR) Step 4: Calculate position size (based on stop distance and risk %) Step 5: Execute the trade Step 6: Exit (at take-profit or when trend breaks)

Missing any step breaks the system.

Real example of the complete system:

You have a $10,000 account. You decide to risk 2% per trade = $200 risk per trade.

A stock is in an uptrend (above 50-day MA). Price bounces off support at $50. You identify an entry at $50.10. Support is at $50. Resistance is at $55. ATR is $2. Your stop loss should be 2 ATRs below the bounce: $50 - ($2 × 1) = $48. But support is at $50, so your stop is at $49.90 (just below support).

Stop distance: $50.10 - $49.90 = $0.20

Position size: $200 ÷ $0.20 = 1,000 shares

You buy 1,000 shares at $50.10. If the trade hits your stop at $49.90, you lose $200. If it hits your target at $55, you make $4,900.

Risk-to-reward: $4,900 ÷ $200 = 24.5:1 (excellent)

Why position size depends on stop loss distance:

You can't just "buy 100 shares." The position size depends on how far your stop loss is.

Same trade, different stop placement:

Scenario A: Stop at $49.90 (tight, $0.20 away) Position size: $200 ÷ $0.20 = 1,000 shares

Scenario B: Stop at $48.00 (loose, $2.10 away) Position size: $200 ÷ $2.10 = 95 shares

Both risk $200. But Scenario A gives you 1,000 shares and Scenario B gives you 95 shares. Position size is determined by stop distance, not by how many shares you feel like buying.

The risk management rules within trend following:

Rule 1: Every trade risks 1-2% of account. Rule 2: Stops are always at technical levels (support, resistance), not arbitrary numbers. Rule 3: Stop distance is confirmed by ATR (if ATR says $2, stop is $2 away, not $0.50). Rule 4: If the setup doesn't give you a 2:1 risk-to-reward ratio, skip the trade. Rule 5: Never move your stop loss after entry (except to breakeven or better).

Combining trend following + support/resistance + position sizing:

Uptrend confirmed (price above 50-day MA). Support identified at $50 (bounced off it 3 times). Price bounces off $50 and closes at $50.10.

This is your entry. Your stop is just below $50 ($49.90). You calculate position size from this.

You're not guessing your stop. You're not being emotional. The chart tells you where the stop goes. The math tells you how many shares to buy.

What to do if the setup doesn't have good risk-to-reward:

Sometimes the math doesn't work. Support is $1 away. Resistance is only $