---
title: 'How Professional Traders Know When to Size Up'
source: 'https://youtube.com/watch?v=J8RJwyKjJr4'
video_id: 'J8RJwyKjJr4'
date: 2026-08-10
duration_sec: 86
---

# How Professional Traders Know When to Size Up

> Source: [How Professional Traders Know When to Size Up](https://youtube.com/watch?v=J8RJwyKjJr4)

## Summary

This video explains how professional traders adjust their position sizes based on the quality of each trading opportunity, rather than using a fixed percentage risk on every trade. It introduces a five-grade system (D, C, B, A, A+) that assigns a percentage of the daily stop loss to each trade, and demonstrates the dramatic impact this approach can have on overall returns.

### Key Points

- **Fixed risk is not professional** [00:02] — The video challenges the common advice of risking a fixed percentage (e.g., 2%) on every trade, stating that professional traders change their bet size based on the quality of the opportunity.
- **Five-grade system** [00:16] — Every trade is graded before sizing. Grades are: D (zero risk, default), C (5% of daily stop, marginal setup, skill-building), B (15% of daily stop, solid setup), A (30% of daily stop, strong catalyst, confirmed structure, favorable environment), and A+ (80% of daily stop, rare, all three questions answered with an absolute yes).
- **Impact on returns** [01:00] — On a $1,000 daily stop, taking 50 trades at C size versus A+ size (same trades, entries, and exits) results in a 250% return versus a 1,000% return. The edge is in how you size trades, not the trades themselves.

### Conclusion

The key takeaway is that professional traders scale their position sizes according to the quality of each setup, which can dramatically amplify returns. The video teases a full mathematical breakdown and invites viewers to comment 'math' for a dedicated short.

## Transcript

risk a fixed percentage in every single trade, like 2% always, no matter what. close. What professional traders actually do is change their bet size based on the quality of the opportunity, and here's
Every trade on our desk gets a grade before it gets sized. Five grades. D is zero risk. It's your default grade on every trade, that's where it starts, zero risk, no exceptions. C is 5% of your daily stop.
It's a marginal setup, it's really a skill building rep, right? It's low B is 15% of your daily stop. It's a solid setup. Most of your trades actually should kind of live in the B world. A is 30%, strong catalyst,
confirmed structure, favorable environment. A+ is 80% of your daily stop. It's rare. All three questions are answered with an absolute yes. When you here's the thing most people miss. On a
$1,000 daily stop, the difference between taking 50 trades at C size appropriately, same trade, same entry, same exits, is the difference between a same exits, is the difference between a 250% return and a 1,000% return on the
same trades. The edge isn't in the trades, it's in how you size them. We broke down the full math in this video. Comment math if you want me to walk Comment math if you want me to walk through more in a dedicated short.