What Is Leverage in Trading?

Michael Whitman · Trading since 2017, full-time since 2020 · YouTube creator, 137K subscribers · Published 2026-09-14 · Updated 2026-10-27

Leverage is the one tool in trading that does exactly what it says and is still misunderstood almost universally. It does not make a strategy better. It makes every price move bigger relative to your account, in both directions, by the same factor.

How it works

You put up part of the value and borrow the rest. Ten times leverage means $1,000 of your money controls $10,000 of the instrument. The position moves on the full $10,000; the losses come out of your $1,000.

It is symmetrical, and the symmetry is the problem. A tenfold multiplier on a good trade is attractive. The identical multiplier applies to a bad one, and losses have a property gains do not: they shrink the base that future gains are calculated on.

The requirement is not fixed. As a position moves against you, the broker wants more collateral against a loss that is now larger. That demand arrives at the worst possible moment by construction.

And when it cannot be met, the position is closed for you — at a price chosen by the mechanism rather than by your plan.

Leverage does not need borrowed cash at all: a total return swap carries most of a 3x fund’s exposure, between 64.52% and 85.32% in TQQQ’s quarterly SEC filings since 2019.

A worked example

Say a market moves about 0.5% on an ordinary day and about 1.1% on a busy one, the kind that comes round roughly one day in ten. Neither is dramatic; both are what a normal week looks like.

At 2 times leverage, that typical bar is about 1% of equity. Unremarkable. A run of them is a bad week and nothing more.

At 50 times — routinely offered on currency accounts — the same ordinary bar is about 25% of equity. The busy day, which arrives about one day in ten, is about 55%.

Nothing about the market changed between those two examples. The bars are identical. The only variable is a multiplier chosen in an account setting, and it converts a normal day into an account event.

Now add persistence. Three busy days in a row against the position is 165% of equity at 50 times. A strategy does not need a crash, a shock or a mistake — it needs the market to do one of the most ordinary things it does.

What it does not change

The win rate is untouched. A strategy that is right 54% of the time at 2 times leverage is right 54% of the time at 50. The multiplier operates on the size of each outcome and has no contact with the probability of it.

The expectancy per unit is untouched too. Average profit per trade, expressed as a fraction of what was risked, is the same number at every leverage. What changes is how much is being risked, which is a separate decision that leverage makes easy to take without noticing.

So leverage is never the reason a strategy works. It is a reason results are larger, in whichever direction they were already going. A losing method at 50 times is a losing method arriving sooner, and that is the whole of its effect on a negative edge.

What it does change is the number of chances you get. An edge needs a sample to show up in, and every increase in leverage reduces how many trades the account can survive to place. Past a certain multiple the strategy cannot reach the sample size its own edge requires, which is a mathematical statement rather than a cautious one.

What it costs to hold

Borrowed money is not free. Financing is charged on the full position size, not on your share of it, so a position held for weeks pays interest on an amount many times the capital committed.

And the survivable amount is set by volatility, not by what is offered. The maximum a broker permits is a legal and commercial limit. The maximum that makes sense is arithmetic, and it falls as bars get bigger.

The original data

Of the 24,971 trading and investing videos measured for this site, 55 have “leverage” in the title, from 50 channels, at a median of 36,446 views.

Apply leverage to the S&P 500’s own record and the whole argument is visible: its worst fall since 1950 was 56.8%, from October 2007 to March 2009. Held at 2 times, that fall is 113.6% of equity — more than the entire account — and at 50 times a fall of just 2% does the same job.

That last figure is the one that matters, because it is where the loss stops being capped by the money you deposited. A gap through the liquidation level does not pause for the mechanism to work.

When it fails

The characteristic failure is treating high leverage as optional headroom. The reasoning is that offered leverage is a ceiling, not an instruction, and a disciplined trader can use a fraction of it. That is correct and it is not what happens: the available size anchors the position size, the account takes a fraction of a very large number, and the resulting exposure is still several times what the strategy was tested at. The leverage was never used deliberately — it was used by comparison.

The question: Ten times leverage and a one percent move. What is left?

A second failure is assuming the stop caps the loss. Above a certain multiple the gap risk exceeds the deposit, so the worst case is not the stop distance — it is the overnight move.

A third is sizing in lots rather than in risk, which makes the exposure a moving target as volatility changes.

A fourth is adding to a losing leveraged position, which raises the multiplier precisely as the margin buffer shrinks.

And a fifth is reading a good run as evidence the leverage was appropriate. It is evidence the long losing run has not arrived yet, and on this series that run is 11 bars and already measured.

Related

Risk of ruin covers what a normal losing run costs once size is multiplied. Risk management covers the sizing rules that decide the multiple. And volatility covers the bar sizes every figure above is built from.

This page is educational, not financial advice. Test every idea on your own charts before risking money.