What Is Drawdown in Trading? An Open Course

What is drawdown in trading? It is the fall in an account from its highest value to its lowest point before a new high. Every method has drawdowns, including good ones. What matters is how deep they go, how long they last, and whether you are still trading the plan at the bottom.

Why does drawdown matter more than return?

Because losses compound against you. An account that loses 20% needs 25% to recover; one that loses 50% needs 100%. A trader who sizes for the best case meets the worst case sooner or later, and the course shows in plain arithmetic how often it comes.

How do you keep a drawdown survivable?

By choosing the risk per trade from the drawdown you can accept, not from the profit you hope for. The course works through the numbers for a few common win rates and payoffs, without formulas beyond arithmetic.

Where does this course lead?

To Stop Losses, Position Sizing and Your Trading Edge in the Foundation Certificate in Trading, which turns these ideas into a sizing rule you apply to every trade.

What you will be able to do

• Calculate the required recovery percentage for any drawdown depth and explain why the gap between the loss and the required gain widens at an accelerating rate.
• Explain why the recovery period consumes all available gains without advancing net equity, effectively converting profitable trading into a debt-repayment exercise for months or years.
• Predict the likelihood of extended losing streaks for a given win rate and sample size, and distinguish normal statistical variance from genuine edge degradation.
• Size positions using fixed fractional rules, apply the Kelly formula to evaluate strategy expectancy, and select a practical fraction that keeps the account solvent through normal losing runs.
• Read an equity curve as a four-gauge risk dashboard, tracking slope, smoothness, drawdown depth, and time underwater as distinct diagnostic signals rather than a single verdict on performance.
• Apply tiered position-reduction thresholds and a hard-halt rule designed before any drawdown occurs, removing discretion from the moments when judgment is least reliable.
• Diagnose a losing stretch using win rate, payoff ratio, and minimum sample-size evidence to determine whether to reduce size and continue or retire the strategy.

Syllabus, module by module

1. Drawdown Defined: Peak to Trough and Back Again

   Defines drawdown, the high-water mark, and the distinction between balance and equity, then shows why recovery math is asymmetric and how drawdowns create a self-reinforcing neurochemical feedback loop.

2. The Arithmetic of Recovery: Why Losses Hit Harder Than Gains

   Derives the recovery gain formula, maps the full table of loss-to-recovery asymmetry, and explains why the thirty-percent threshold marks a meaningful shift in how structurally difficult recovery becomes.

3. Losing Streaks: How Normal They Are and How Lethal They Feel

   Proves with probability calculations and documented experiments that extended losing streaks are a mathematical certainty for any trading system, and explains why the brain misreads them as evidence of edge failure.

4. Position Size: The One Variable That Controls Your Drawdown

   Establishes position size as the only variable a trader fully controls, derives the Kelly formula and its practical limits, and grounds the professional sizing range in the mathematics of ruin probability.

5. Putting It Together: Reading Your Equity Curve Like a Risk Dashboard

   Shows how to calculate maximum drawdown, recovery factor, and autocorrelation on a rolling basis, and how to design gear-change thresholds and a hard-halt rule that remove discretion from the worst moments.

6. Surviving the Long Road Back

   Presents the historical record of market drawdowns and recovery times, introduces the Calmar ratio alongside maximum drawdown and recovery factor, and builds a complete protocol for position-size reduction, trading pauses, and strategy diagnosis.

What every course contains

Every paid course comes with the first seven and the certificate, whichever level it sits at. The proctored exam and the credential come when the course is taken as part of a Certificate, Diploma or Fellowship. Everything is self-paced: the material is yours to study in any order, at any hour, for the whole of the license.

1. Workbooks. Written to train the thinking patterns and the important concepts of the course, with worked problems and the reasoning behind each answer, so that you learn to think the way the subject is thought.
2. Audio edition. Focused, well-presented recordings with explainers and examples of the material, made to be interesting, relevant and entertaining, so that the general subject can be learned away from the desk.
3. Notes. Pre-produced notes with every fact the course relies on, written out in full, so that nothing has to be transcribed from the films or the audio.
4. Cheat sheet. One sheet with every important learning concept of the course on it, to keep beside you during the work and to revise from before the exam.
5. Named sources. Every fact in the notes names its source, the paper, the book or the dataset, for anyone who wants to dig in further.
6. Explainer films. Focused films, in the style of the sample films on the catalog page, that walk through the most difficult concepts of the course with visual explanations of a high standard.
7. Transcript. A full transcript of every film and every audio recording, searchable and quotable.
8. Proctored exam. Taken as part of a Certificate, Diploma or Fellowship, the course ends in a proctored multiple-choice questionnaire, with a pass mark of 60% and three retakes included. A course taken on its own is assessed by its coursework and has no exam.
9. Verifiable certificate. A certificate of completion that a third party can verify: an employer sends the code on it to the credentials office and receives written confirmation of the course, the date and the result.
10. Credential of the program. The Certificate, Diploma or Fellowship of the program, track or path the course belongs to, awarded when every course in it is passed. Which one depends on the program you choose.

Assessment

Not assessed. Study notes, a cheat sheet and a workbook come with every lesson. Open courses are free, have no exam and award no certificate. Read how certification works.