30% Rule
40% Rule
50% Rule
Most prop firms use a 30% or 40% threshold.
function calculateConsistency() {
var totalProfit = parseFloat(document.getElementById('totalProfit').value);
var highestDay = parseFloat(document.getElementById('highestDay').value);
var rulePercent = parseFloat(document.getElementById('rulePercentage').value);
var resultDiv = document.getElementById('consistencyResult');
var statusHeader = document.getElementById('statusHeader');
var maxAllowedText = document.getElementById('maxAllowedText');
var currentRatioText = document.getElementById('currentRatioText');
var actionText = document.getElementById('actionText');
if (isNaN(totalProfit) || isNaN(highestDay) || totalProfit <= 0) {
alert('Please enter valid positive numbers for profit fields.');
return;
}
var maxAllowedProfit = totalProfit * (rulePercent / 100);
var currentPercentage = (highestDay / totalProfit) * 100;
var isCompliant = highestDay <= maxAllowedProfit;
resultDiv.style.display = 'block';
if (isCompliant) {
statusHeader.innerHTML = '✅ Compliant';
statusHeader.style.color = '#2e7d32';
actionText.innerHTML = 'Your trading activity follows the consistency rule.';
actionText.style.color = '#2e7d32';
} else {
var requiredTotal = highestDay / (rulePercent / 100);
var bufferNeeded = requiredTotal – totalProfit;
statusHeader.innerHTML = '⚠️ Non-Compliant';
actionText.innerHTML = 'To become compliant, you need to earn an additional $' + bufferNeeded.toFixed(2) + ' in total profit (without exceeding your current highest day).';
actionText.style.color = '#d32f2f';
}
maxAllowedText.innerHTML = 'Based on a ' + rulePercent + '% rule, your maximum allowed single-day profit is: $' + maxAllowedProfit.toFixed(2) + '';
currentRatioText.innerHTML = 'Your highest day ($' + highestDay.toFixed(2) + ') accounts for ' + currentPercentage.toFixed(2) + '% of your total profit.';
}
Understanding the Consistency Rule
In the world of proprietary trading, the Consistency Rule is a mechanism used by firms to ensure that a trader's success is based on repeatable strategy rather than a single "lucky" trade or gambling on high-impact news events. Most firms implement a 30%, 40%, or 50% rule during the payout phase or evaluation stages.
How the Calculation Works
The rule typically dictates that no single trading day's profit should exceed a specific percentage of your total profit. The formula used in this calculator is:
Max Allowed Single Day = Total Profit × Consistency %
Example Scenario
If you have earned a total profit of $10,000 and the firm has a 40% consistency rule:
Your maximum allowed profit for any single day is $4,000 ($10,000 × 0.40).
If your best day was $3,500, you are Compliant.
If your best day was $5,000, you are Non-Compliant because $5,000 is 50% of your total profit.
What to do if you are Non-Compliant?
If you violate the rule, most firms do not automatically fail your account. Instead, you are usually required to continue trading to increase your Total Profit until your highest day falls below the required percentage threshold. Use the "Additional Profit Needed" figure from the calculator to determine your next target.