How to Actually Evaluate Stock Performance Like a Pro

It's easy to log into your brokerage, see a green number for the day, and pat yourself on the back like you're doing something right.

But real traders know that how you make money matters just as much as how much you make. Without understanding the process behind your returns, you can't tell a repeatable strategy from a lucky stretch.

If you want to evaluate stock performance like a pro, look beyond total profit. Below are the three measures that tell you more than profit does, with the arithmetic laid out so you can run each one on your own account with nothing more than a calculator.

Metric 1: drawdown (the stress test)

Drawdown measures how far your portfolio falls from its highest point before it recovers. In simple terms, it answers this question: how much did you have to lose along the way?

If you made $1,000 but your account was down $5,000 at one point to get there, you took a large gamble that happened to work out. Professionals don't just ask, "Did I make money?" They ask, "What did it cost me to make it?"

Work out your maximum drawdown from month-end values

Write down your account value at the end of each month. For each month, note the highest value reached so far (the running peak), then divide the current value by that peak and subtract 1. The most negative result is your maximum drawdown.

The maximum drawdown here is -20.0%, from the March peak to the May low ($9,200 ÷ $11,500 - 1). The account didn't set a new high until August, so it spent four month-ends below its peak. By August it was up 21% from January, and that figure on its own tells you nothing about the ride in between.

Two cautions. Month-end values miss lows that happen mid-month, so your true drawdown can be deeper than the table shows. And deposits hide drawdowns: if you had added $2,000 in May, the May balance would read $11,200 and the drop would look like -2.6% instead of -20%. Use values with deposits and withdrawals taken out, or a return series, which is what GIOAT's chart gives you (more on that below).

The recovery math

Losses and gains aren't symmetrical. After a loss of L, the gain you need to get back to even is L ÷ (1 - L).

A -20% drop turns $10,000 into $8,000, and getting back takes $2,000 more, which is 25% of $8,000. At -50%, you need to double what's left. A deep drawdown costs more than its size suggests: the recovery needs a bigger percentage gain and, at the same pace of gains, more time.

Metric 2: risk-adjusted return (the efficiency test)

Anyone can generate high returns if they're willing to take extreme risks. That doesn't make them skilled.

It's like driving a car: anyone can hit 100 mph if they don't care about the engine blowing up. A professional driver knows how to get the most speed with the least wear and tear on the vehicle.

Risk-adjusted return measures how much return you're generating relative to the risk you're taking. A 10% return achieved responsibly is often worth more than a 30% return that could wipe you out the next week.

Compare two accounts on return and drawdown

Here is a version you can do without any software: divide the return by the maximum drawdown. Say two hypothetical accounts finish the same year like this:

Account B made more, but it earned 0.75 points of return for every point it fell along the way. Account A earned 2.25. Think about B's year from the point of view of someone who started at its peak: they were down 40% and needed a 66.7% gain just to get back to even (0.40 ÷ 0.60). Professionals use more refined versions of this idea, such as the Sharpe and Calmar ratios, but the question they ask is the same.

One year is a small sample. A low drawdown can also mean the risk hasn't shown up yet: a strategy that sells options can post small, steady gains for months and then give back a large chunk in a week. Use the ratio as a prompt to ask how the return was made.

Compare against an index over the same dates

Another useful check is a comparison with a benchmark like the S&P 500. Are you beating the market, or taking more risk to get an average result? The comparison only means something if both numbers cover exactly the same dates.

1. Pick the period your return covers, for example January 2 to September 30.
2. Look up the index's closing level on both dates. Say it closed at 4,800 on the first and 5,280 on the last.
3. Work out the index return: 5,280 ÷ 4,800 - 1 = +10.0%.
4. Put your time-weighted return for the same dates next to it. If yours is +9.0%, you trailed the index by one percentage point.
5. Compare drawdowns over the same window. If the index's worst drop was -8% and yours was -20%, you took on far more pain for a slightly lower result.

Three details keep the comparison fair. Use a time-weighted return rather than your balance change, because deposits inflate the balance. An index's headline level usually leaves out dividends while your account collects them, so a total-return version of the index, or an index fund's total return, is a fairer yardstick. And match currencies: a Canadian-dollar account measured against a US-dollar index mixes in exchange-rate moves.

Metric 3: consistency vs the one-hit wonder

A lot of traders build their reputation on one big win: a 200% trade, a lucky crypto run, or a perfectly timed entry. But what happened before that point, and what happens after?

If your equity curve is full of sharp ups and downs, it's hard to tell skill from luck. A steady, upward climb might look boring, and it won't go viral on X or in your Telegram group chat. But it's far easier to judge, because no single trade explains it.

Test how much one trade carries your year

Divide your best trade's profit by your total profit for the period. Say you're up $6,000 this year and your best trade made $5,000: 83% of your gain came from one decision. Take it out and you made $1,000. That doesn't make the year bad, but it tells you the result rests on something you may not be able to repeat. Run the same check on your worst trade to see how much a single mistake cost you.

What GIOAT shows you, and what you calculate yourself

Tracking all of this by hand is tedious. GIOAT connects to your brokerage read-only and handles part of the work. Your dashboard shows:

• Verified Return: your time-weighted return for this year with deposits and withdrawals taken out, or since you connected if that was later.
• Simple Return: your dollar profit or loss (realized plus unrealized) divided by the net cash you've deposited.
• Profit and loss: realized and unrealized P/L, current value and total invested.
• Win rate: with your count of winning and losing closed trades, plus your average gain per trade.
• Holdings and trades: your current holdings, your last trade and your full trade history.
• Return chart: 1W, 1M, 3M, YTD, 1Y and 2Y views.

GIOAT does not calculate drawdown, a risk-adjusted ratio, a consistency score or a benchmark comparison. You can do all four with the methods above. For drawdown, hover over the return chart to read the cumulative return on any date, turn each reading into an index by adding 1, and apply the peak-to-low method. If the chart reads +12% at its high and -2% at a later low, the drawdown is 0.98 ÷ 1.12 - 1 = -12.5%. Because the chart is time-weighted, deposits your broker reports don't hide the drop.

A few limits to keep in mind. The chart only covers the period for which GIOAT has daily snapshots of your account. The headline return resets every January 1. Win rate counts closed trades only, so a losing position you're still holding doesn't lower it, though it does show up in your return. And the numbers refresh about once an hour.

Final thoughts: stop chasing profit and start understanding performance

Profit alone doesn't show the risk you took, the losses you sat through, or whether your results are repeatable. Maximum drawdown, the return-to-drawdown ratio, an index comparison over the same dates and the one-trade test each take a few minutes, and together they tell you much more than a profit figure.

If you want your time-weighted return and trade history in one place, connect your account to GIOAT and run these checks on your own numbers. You can see how other traders' verified returns compare on the verified leaderboard, and why a balance screenshot can't stand in for any of this in screenshots vs verified trades.