What open interest counts.
Open interest describes positions that remain open under the market-data provider’s rules. Volume counts transactions during a period. CME Group explains the standard futures definitions in its Open Interest lesson.
A change describes outstanding positions; it does not say which side has the stronger view or why positions changed. Provider fields and units can differ. Bybit’s current API documentation distinguishes an open-interest value reported as the sum of both sides from a single-side value, and uses different units for linear and inverse contracts. Values from different symbols, product types or fields are not like-for-like readings.
What a long/short ratio measures.
“Long/short ratio” is a label, not one universal calculation. The forum question compared a Top Trader ratio with a wider trader ratio. Provider definitions determine whether a value counts accounts, positions or a named trader group. For example, Bybit’s account-ratio endpoint reports the share of holders with long and short positions for a product category, symbol and period; that does not define every platform’s Top Trader measure.
A ratio describes its selected group for that instrument and interval. It does not cover every trader or venue, and an account count does not show the size of each position. The provider’s definition determines what a higher or lower value represents.
My answer about open interest.
In my reply, I said I do not use long/short ratios and look at open interest alongside price as a second opinion. That was a description of my own process.
A rise or fall in open interest shows a change under that provider’s measurement rules. It does not identify who opened or closed positions, why positions changed, or what price will do next.
- Price rising while open interest rises: the provider’s open-interest value increased during the move; it does not prove that only long positions were added or that leverage drove the change.
- Price falling while open interest falls: this can be consistent with positions closing under the provider’s rules; it does not show who closed or whether the move has finished.
- Open interest stays high as price falls: the reading alone does not prove that long positions are trapped or that price will keep falling.
- A sharp one-candle change: its meaning depends on the interval, symbol and provider definition.
Price, volume, open interest and a ratio describe different measures. Readings refer to a like-for-like comparison only when their symbols and time windows align. CME’s definitions treat volume and open interest as distinct measures of activity.
Why provider definitions matter.
- Instrument and venue: a symbol and product type identify the contract being measured, such as spot, linear or inverse contracts.
- Ratio cohort: a ratio may count accounts, positions, contract sizes or a named trader group.
- Time window: an intraday ratio and a daily value are different snapshots.
- Open-interest unit: units can differ across product types and providers.
- Update timing: a delayed or aggregated value may represent an earlier period than the price chart.
The CFTC’s Commitments of Traders reports provide a different view: they summarize Tuesday positions for reportable futures markets and are generally released weekly. Their reporting period differs from an exchange’s intraday account ratio. The related answers cover what I said about entries after a pump and how stop and stop-limit orders differ.
Common questions.
- Should I use a long/short ratio?
- My forum answer described my own practice: I do not use long/short ratios. It did not set a rule for other traders.
- Does rising open interest mean buyers are in control?
- No. Open interest records outstanding positions under the provider's rules. It does not show which side has an advantage, whether leverage is involved or what price will do next.
- Why can ratios differ across exchanges?
- Providers can count different trader groups, instruments, product types and periods. Similar labels can describe different measurements.