Understanding the Equity Stability Score (ESS)
When it comes to trading, making profits is only one part of the story. What truly separates a disciplined trader from a lucky one is consistency. At Top One Trader, we introduced the Equity Stability Score (ESS) to measure not just how much you earn, but how steadily you earn it while maintaining your risk and profits at the same time.
Note: The 30% consistency rule only applies to accounts sized $5,000 to $100,000 that were purchased before October 7, 2025
What Is the Equity Stability Score (ESS)?
The Equity Stability Score (ESS) is a percentage that reflects how balanced and consistent your trading has been. It considers both your largest winning day and your largest losing day, then compares those to your overall profit.
A lower ESS means your trading results are more stable and sustainable, while a higher ESS suggests that your performance may rely too heavily on just one or two outsized trades.
Equity Stability Score (ESS) Formula
ESS = [ Largest Winning Day + Largest Losing Day |Absolute value| ] ÷ Total Profit × 100%
Where:
Largest Winning Day = your single biggest profitable day
Largest Losing Day = your single biggest losing day (counted as a positive number)
Total Profit = your overall net profit
Tip: Keep wins and losses balanced, avoid one oversized day, and if ESS is too high, grow your total profit to bring it down.
Why do we use ESS?
At Top One Trader, we don’t just look for big profits, we look for smart and sustainable trading. Traders who grow their accounts steadily, with solid risk management, are more likely to succeed in the long run. ESS helps us reward consistency, not chaos.
ESS requirement for Prime Accounts
At the time of payout request, your ESS must be 30% or lower. If your ESS score is not 30% yet, you will continue trading until you get the score to 30% or lower.
How is ESS calculated?
Formula: (Largest Winning Day + Largest Losing Day [as a positive number]) ÷ Total Profit × 100%
Example
Largest winning day: $400
Largest losing day: -$350
Total profit: $3,750
Step-by-step:
Remove the minus sign from the loss: $350
Add winning day + losing day: $400 + $350 = $750
Divide the total by the 30% requirement.: $750 / 0.30 = $2,500
Your total profit target will be $2500 to qualify for the 30% ESS score.
Result: Your total profit is $3750 and therefore higher than the $2500 profit target, which puts your ESS score at 20%, which qualifies for a payout!
How to maintain a healthy ESS
If your ESS is 30% or lower:
You’re trading with consistency
You’re managing risk
You’re eligible to request a payout (as long as other rules are also met)
If your ESS is above 30%:
Keep trading steadily, avoid setting new “largest” days, and your ESS will improve over time
For any questions or assistance, feel free to contact our support team at [email protected]