Long / Short Ratio Calculator
Market sentiment indicator: L/S ratio = Long ÷ Short. Above 1 means more long than short positions.
Inputs
Drag the handle (or focus it and press ↑/↓) to reorder. Scientific notation such as 1.2e6 is accepted. Use the same measure (accounts, contracts or value) for long and short. Pick any unit; conversion is automatic.
Results
Enter values and press Calculate. Your answer will appear here.
Long vs. short positioning
The bar shows each side’s share of all positions. The gauge places the ratio on a log scale, so 2 (twice as many longs) and 0.5 (twice as many shorts) sit the same distance from 1. The shaded area is your neutral zone.
What is being calculated
Common examples
| Case | L/S | Long share | Reading |
|---|
Illustrative inputs, not manufacturer data.
How to read the ratio
| L/S ratio | Meaning |
|---|---|
| > 1 (beyond neutral zone) | More long than short positions: long-heavy, bullish positioning |
| ≈ 1 (inside neutral zone) | Balanced positioning |
| < 1 (beyond neutral zone) | More short than long positions: short-heavy, bearish positioning |
Many traders also treat very lopsided readings as a crowded trade that can reverse, but a ratio on its own does not predict price. Use it with other information.
Ratio and share conversions
| L/S ratio | Long share | Short share |
|---|
Long share = ratio ÷ (1 + ratio). Ratio from share: ratio = share ÷ (1 − share). Units: K = thousand, M = million, B = billion.
Formula
- Long: total long positions (accounts, contracts or value)
- Short: total short positions, in the same measure
- Long share = Long ÷ (Long + Short)
- Net position = Long − Short
Example: Long = 5,400 and Short = 4,000. L/S = 5,400 ÷ 4,000 = 1.35. Long share = 5,400 ÷ 9,400 ≈ 57.45 %, short share ≈ 42.55 %, so the reading is long-heavy.
If the short side is 0 the ratio is unbounded (∞); if the long side is 0 the ratio is 0. In Advanced mode you can enter long and total, or the long share in %, and compare against a previous reading. The ratio only describes positioning; exchanges and data providers differ in whether they count accounts, contracts or notional value, so compare like with like. This tool is for information only and is not financial advice.
References
- Investopedia, Long Position: what a long position is
- Investopedia, Short Selling: what a short position is
- CFTC, Commitments of Traders: official long and short positioning data for US futures
How to Use This Tool
- Pick a preset, or enter the long positions and the unit (×1, K, M or B).
- Enter the short positions in the same measure and unit.
- In Advanced, enter long and total instead, or the long share in %, and set your neutral zone or a previous reading.
- Click Calculate.
- Read the ratio and sentiment label, then check the share bar and gauge.
What This Tool Offers
- Basic and Advanced modes on one calculation engine
- K, M and B unit support, or enter long share in %
- Long and short share, inverse S/L ratio and a sentiment label
- Net position, adjustable neutral zone and change from a previous reading (Advanced)
- Share bar and log-scale gauge, with a labelled balance-scale diagram
- Reorderable inputs, presets and a mobile-friendly layout
Variables
| Symbol | Quantity | Unit |
|---|---|---|
| L/S Ratio | Long/short ratio | |
| Total Long Positions | Total value of long positions | currency |
| Total Short Positions | Total value of short positions | currency |
What it means
The long/short ratio shows whether traders are bullish (long) or bearish (short). A high ratio indicates bullish sentiment; a low ratio indicates bearish sentiment. This is used as a contrarian indicator (extreme levels often precede reversals). Understanding this helps traders assess market psychology.
Worked example
Long/Short Ratio – Two Detailed Examples
Real‑World| Parameter | Value |
|---|---|
| Long Positions | $6,000,000,000 |
| Short Positions | $4,000,000,000 |
| Parameter | Value |
|---|---|
| Longs | $3,000,000,000 |
| Shorts | $5,000,000,000 |
Common mistakes
- Long/Short ratio: Total long positions divided by total short positions.
- Total long: The notional value of all long positions.
- Total short: The notional value of all short positions.
- Extreme ratios: May indicate market extremes (sentiment).
Applications
Long/short ratio compares the total value of long positions to short positions in the market. This is a sentiment indicator. A high ratio suggests bullish sentiment, while a low ratio suggests bearish. Traders use it to gauge market extremes and to identify potential reversals. Understanding the long/short ratio helps in contrarian trading.
- Measuring market sentiment (bullish/bearish)
- Identifying over‑crowded trades
- Contrarian signals at extremes
- Assessing the balance of power between buyers and sellers
- Educational understanding of sentiment indicators
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