Open Interest Explained: The Number Behind Every Big Move
Open interest tells you whether money is entering or leaving the market — the context that makes a price move interpretable.
What open interest counts
It is the total value of derivative contracts currently open. Unlike volume, it is a stock, not a flow — it shows what is still at risk right now.
Price up, OI up = new money
This is the healthiest combination for a trend: fresh positions funding the move.
Price up, OI down = short covering
The rally is being driven by shorts closing rather than new buyers arriving, and such rallies frequently fade.
Sharp OI drops mark liquidations
A vertical fall in open interest alongside a violent price move is the signature of a liquidation cascade.
Risk, defined properly
Risk is not volatility, though the two are constantly conflated. Volatility is how much a price moves. Risk is the probability of a permanent loss of capital — of the reason you owned something ceasing to be true. An asset can be extremely volatile and low-risk for a patient holder, or barely move and be extremely risky if it is quietly failing.
The practical difference: volatility is survived with position sizing, risk is avoided with research. Sizing a position so that a 60% drawdown is uncomfortable rather than ruinous handles volatility. Nothing about sizing protects you from owning something whose thesis has broken.
Which is why both jobs need doing. Size for the volatility, research for the risk, and set an alert at the level where the thesis would be in question — so the review is triggered by the market rather than by whether you happened to be paying attention that week.
Never miss a move in the markets you follow
Pick a price or a percentage, choose push, Telegram or email, and let it watch around the clock while quiet hours keep the night to yourself.
- Fires about a second after the price hits
- Runs on our servers, so it reaches you with the app closed
- Free for 3 alerts — no card, no account
Download the app for real-time notifications
Frequently asked questions
Does this apply to stocks and commodities too?
The method does; the numbers do not. Levels, sizing and deciding in advance work identically across asset classes, but thresholds must be recalibrated — equities gap around earnings and only move during market hours, commodities trend more slowly, and currency pairs move a fraction of what crypto does, so a 1% move there is significant.
Set an alert for this: percentage move alerts and crypto price alerts, or every market and alert type. Choosing an app? How the alert apps compare, from their own pricing pages.
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