To The Moon

Most traders don't blow up their accounts because of bad entry setups. They blow up because they trade arbitrary position sizes.

If your strategy is to buy "100 shares" or "1 full lot" on every single trade regardless of where your stop-loss sits, you aren't trading—you are running a high-variance casino strategy.

The Retail Trap: Fixed Sizing vs. Fixed Risk

Here is how 90% of retail traders position size:

1. Pick an entry price.

2. Pick an arbitrary number of shares or contracts (e.g., "$5,000 worth").

3. Set a stop-loss wherever the chart "looks good."

Why this leads to account blowups: If Trade A has a 2% stop-loss distance and Trade B has a 10% stop-loss distance, taking $5,000 position sizes on both means you are risking 5x more dollar value on Trade B. One bad volatile trade erases five good trades.

The Universal Position Sizing Formula $Vanguard S&P 500 ETF(VOO)$

Position sizing must always be derived backward from your maximum account risk dollar amount, never forward from your total account balance.

Step 1: Account Dollar Risk = Account Balance * Risk Percentage

Step 2: Risk Per Share = Entry Price - Stop Loss Price

Step 3: Position Size (Shares) = Account Dollar Risk / Risk Per Share

Worked Example: Stocks / Crypto $NVIDIA(NVDA)$

Let's run the math on a $10,000 trading account risking 1% per trade ($100 max loss).

• Account Size: $10,000

• Risk Limit: 1% = $100 maximum risk

• Setup Entry Price: $50.00

• Technical Stop-Loss: $46.00

• Stop Distance (Risk Per Share): $50.00 - $46.00 = $4.00

Position Size = $100 / $4.00 = 25 Shares

Total Capital Committed = 25 * $50 = $1,250

Notice that even though your account is $10,000, you only deploy $1,250 worth of capital to ensure your total potential loss never exceeds your $100 risk budget.

Quick Check Before Taking Your Next Trade

• Do you know your exact dollar loss before clicking Buy?

• Did you adjust position size based on volatility distance, or did you stick to a default lot size?

Drop your current risk-per-trade percentage in the comments below. Markets change, rules don’t. What’s your #1 trading rule?