Do Trading Indicators Actually Work?
Do indicators work is a question that can only be answered against a control. Compare entries on a moving average convergence divergence (MACD) cross with an equal number on a fixed schedule, same stop and target; if they perform alike, the indicator described the move rather than anticipating it.
Covered on this page: TradingView.
The question is usually argued. It is answerable, but only if the indicator is tested against something — and the something almost nobody uses is entering at random.
How it works
Say every MACD bullish cross on a daily chart is taken as a long, with the stop and the target set at the same multiple of the average true range.
Say that gives 26 signals: 14 reach the target, 11 are stopped, one is still open at the end.
On its own that looks like a working indicator. A little better than even money, which is what a tutorial would show you and stop.
Against a control
Now take 26 entries on a fixed schedule instead — every 21st bar, with no reference to any indicator at all.
Say 14 reach the target and 12 are stopped.
Then the indicator and the calendar performed the same.
That is the measurement the question needs, and it is the one that is almost never run. A signal is only worth its complexity if it beats entering without one, and in this example it does not.
Neither arm’s absolute record means anything. Both are longs, and on a rising market such as the S&P 500, where 59% of 19,290 ten-day windows from 1950 to 2026 finished higher, both are flattered by the same amount — which is exactly why the comparison is readable even though the individual numbers are not.
That is what a control is for. It absorbs everything the two arms share — the drift, the volatility, the cost, the stop distance — and leaves only the thing being tested.
The result that disagrees
Now run the identical test on a weekly view of the same chart, and say it gives nine crosses: 3 wins and 6 losses. Nine scheduled entries: 7 and 2.
On that sample the indicator looks actively harmful.
Both tests would be honest, and they contradict each other. The difference is that one has 26 trades and the other has nine, and nine trades cannot distinguish anything — as the trading journal page puts it, 25 trades leaves a win rate uncertain by about 20 points either way.
So the honest conclusion is the weaker one: a MACD cross that does not beat a schedule has shown nothing, and anyone claiming a stronger result in either direction from a sample this size is reading noise.
Why lag is structural
At a swing low, the confirming cross can only arrive some bars later.
That is not a flaw in the MACD. Every indicator is computed from prices that have already printed, so a turn can only be reported after enough bars exist to establish it. The moving average page shows the same arithmetic in its simplest form.
An indicator is a description of what has happened. Treating a description as a prediction is the mistake, and it is built into the way they are usually taught rather than into the tools.
What they are actually good for
Three uses survive the test above, and all three are smaller claims than “signal”.
Measurement. average true range (ATR) tells you how far this instrument moves, which sets a stop distance you would otherwise guess. Nothing on this page argues against that, and it is the most valuable thing an indicator does.
Filtering. A condition that stops you taking a trade — the volume weighted average price (VWAP) strategies page measures one — changes what you skip rather than what you enter.
Consistency. A rule you apply the same way every time is testable; a judgment is not. That is worth something even when the rule itself is no better than a schedule.
A worked example
Take your indicator’s signal and count every firing across a long history. Every one, not the good ones.
Then take the same number of entries on a schedule — every twentieth bar, ignoring the chart completely.
Trade both with the same stop and the same target.
If the indicator does not beat the schedule, it is not an entry signal. It may still be a useful measurement, and that is a different job with a different test.
The original data
Across our study of 24,971 trading videos, 31 ask in the title whether indicators work. The median one gets 1,749 views — one of the lowest of any subject measured here.
84% never pass 50,000 views, and the median length is 7.0 minutes.
The corpus carries description text for 19 of those 31, and across those 19, 2 mention invalidation, failure, or what a bad read looks like.
A field of 31 videos asking whether the tools work, of which about one described video in ten mentions a case where a read was wrong. Meanwhile the MACD itself has an audience many times this one — the question is much less popular than the tool.
When it fails
The test proves too much
One rule on one instrument over one period is not a verdict on indicators. It is a demonstration of how the question has to be asked, and the answer will differ by market, by rule and by period.
You test only the good conditions
Running the test on a trending stretch and skipping the ranging one is how every indicator passes. The control has to see the same bars.
You conclude they are useless
Not what the measurement says. It says a cross that fails to beat a schedule is not an edge. Measurement and filtering are untouched by that, and they are most of what indicators are for.
You judged from the right-hand edge
At the moment it fires, the three that won and the six that lost are the same picture. Which is why the count matters more than any example either of us could pick.
Related
Choosing indicators is the next question: if they are measurements, which ones measure different things?
MACD is the tool tested on this page, explained properly.
And what nobody tells beginners has the scarcity numbers that make small samples unavoidable.
Indicators are measurements, not signals. They measure something you would otherwise estimate by eye — how far price has stretched, how wide the bars are, where the average sits. Treat them as answers rather than measurements and they stop helping.
— Michael Whitman
This page is educational, not financial advice. Test every idea on your own charts before risking money. Some links on this page earn a commission if you buy through them. It costs you nothing and it does not decide what appears here or in what order — how these pages are made is set out in our methodology.