function calculateStats() {
// 1. Get Inputs
var wins = document.getElementById('numWins').value;
var losses = document.getElementById('numLosses').value;
var avgWin = document.getElementById('avgWin').value;
var avgLoss = document.getElementById('avgLoss').value;
// Convert to numbers
var w = parseFloat(wins);
var l = parseFloat(losses);
var aw = avgWin ? parseFloat(avgWin) : 0;
var al = avgLoss ? parseFloat(avgLoss) : 0;
// Validation
if (isNaN(w) || isNaN(l)) {
alert("Please enter valid numbers for Winning and Losing trades.");
return;
}
var total = w + l;
if (total === 0) {
alert("Total trades cannot be zero.");
return;
}
// 2. Core Calculations
var winRate = (w / total) * 100;
var lossRate = (l / total) * 100;
// 3. Display Core Results
document.getElementById('displayWinRate').innerText = winRate.toFixed(2) + "%";
document.getElementById('displayLossRate').innerText = lossRate.toFixed(2) + "%";
document.getElementById('displayTotalTrades').innerText = total;
// 4. Advanced Calculations (Risk/Reward & Expectancy)
var plRatioText = "N/A";
var expectancyText = "N/A";
var expectancyNote = "";
// Only calculate if monetary values are provided
if (aw > 0 && al > 0) {
// Profit/Loss Ratio (Risk:Reward)
// Usually expressed as Average Win / Average Loss
var ratio = aw / al;
plRatioText = "1 : " + ratio.toFixed(2);
// Expectancy Formula: (Win % * Avg Win) – (Loss % * Avg Loss)
// Note: Use decimal form for percentage in calculation (e.g. 0.50)
var winDecimal = w / total;
var lossDecimal = l / total;
var expectancy = (winDecimal * aw) – (lossDecimal * al);
expectancyText = "$" + expectancy.toFixed(2);
if (expectancy > 0) {
document.getElementById('displayExpectancy').className = "result-value green";
expectancyNote = "Positive Expectancy: Your system is profitable over the long run.";
} else {
document.getElementById('displayExpectancy').className = "result-value red";
expectancyNote = "Negative Expectancy: You are losing money on average per trade.";
}
} else {
document.getElementById('displayExpectancy').className = "result-value";
expectancyNote = "Enter Avg Win/Loss amounts to see expectancy.";
}
document.getElementById('displayPLRatio').innerText = plRatioText;
document.getElementById('displayExpectancy').innerText = expectancyText;
document.getElementById('expectancyNote').innerText = expectancyNote;
// Show results
document.getElementById('results').style.display = 'block';
}
Understanding Your Trading Win Rate
Whether you are trading Forex, Stocks, Crypto, or Options, knowing your statistics is crucial for long-term survival and profitability. This Trade Win Rate Calculator helps you quickly determine the percentage of trades that are profitable versus those that result in a loss. Additionally, if you input your average monetary win and loss amounts, it calculates your system's mathematical expectancy.
How to Calculate Trade Win Rate
The formula for calculating your win rate is straightforward. It represents the ratio of winning trades to the total number of trades executed.
Formula:
Win Rate % = (Number of Wins / Total Number of Trades) × 100
For example, if you have taken 100 trades, and 60 of them were winners:
Wins: 60
Total Trades: 100
Calculation: (60 / 100) × 100 = 60% Win Rate
Win Rate vs. Risk/Reward Ratio
A common misconception among new traders is that a high win rate is the only path to profitability. In reality, your Risk/Reward Ratio (Profit/Loss Ratio) is just as important.
You can be profitable with a low win rate if your winning trades are significantly larger than your losing trades. Conversely, a high win rate strategy can lose money if the few losses are catastrophic compared to the small wins.
The Profitability Matrix
High Win Rate + Low Risk/Reward: Scalping strategies often rely on winning 70-80% of the time with small profits.
Low Win Rate + High Risk/Reward: Trend following strategies may only win 30-40% of the time, but winners might be 3x or 4x the size of losers.
What is Trading Expectancy?
The most powerful metric this calculator provides is Expectancy. This number tells you the average amount of money you can expect to make (or lose) per trade over a large sample size.
Formula:
Expectancy = (Win % × Average Win $) – (Loss % × Average Loss $)
If your expectancy is a positive number, your trading system has a "statistical edge." If it is negative, the casino (market) has the edge, and you will eventually drain your account regardless of your win rate.
How to Use This Calculator
Enter Wins & Losses: Input the raw count of your winning and losing trades from your trading journal.
Enter Average P&L (Optional): For deeper insight, input the average dollar amount of your winners and losers.
Analyze: Check if your expectancy is positive. If it is negative, you either need to improve your win rate (better entries) or improve your risk/reward ratio (cut losses sooner or let winners run longer).