The basic formula
If the spread is defined as Contract A minus Contract B, subtract the price of the second leg from the first. If December Corn is 527.50 and May Corn is 548.25, December minus May equals -20.75 cents.
527.50 − 548.25 = -20.75¢. If the relationship later moves to -15.75¢, the spread has risen by 5 cents.

Why leg order matters
Reverse the calculation and the chart direction reverses. A consistent research process should never switch formulas between years or between the chart and the backtest.
Use the live Futures Spread research workflow
Select exact Corn contracts, compare historical windows, inspect every season and connect the result with the current curve.
Start AnalyzingTranslate spread movement into dollars
The dollar value depends on the contract specification and point value. The same numerical move can have different economic meaning in different futures markets.
A calculator is only the first step
The current spread value does not tell you whether the relationship is historically unusual or attractive. Compare it with seasonal history, prior years and the current forward curve.

How to calculate the trade move correctly
Once the spread formula is fixed, the strategy move is the change in that spread from entry to exit. If a long spread moves from -20.75¢ to -15.75¢, the spread improved by +5¢. If you were short the spread, the same move would be a loss before costs.
The sign of the spread itself is not the profit or loss. What matters is the change in the spread relative to the trade direction.
Common calculator mistakes
- Reversing the two legs between analysis and execution.
- Confusing spread level with spread move.
- Ignoring the contract's point value.
- Comparing prices from different timestamps or conventions.
- Assuming a negative spread means a losing trade.
A reliable calculator should make the leg order and unit conversion explicit so the result can be checked independently.
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Frequently asked questions
Is Futures Spread free to use?
The site provides direct access to the research interface and current Corn spread tools. Pricing and access terms can change, so use the live product pages for the current offering.
Which market does the live analyzer support?
The current live research workflow is focused on Corn dated futures contracts and Corn calendar spreads.
Does the tool give trading signals?
No. It provides historical seasonality, spread relationships, rankings and curve context for research. Historical patterns are not forecasts.
Why use dated contracts instead of a continuous futures chart?
Calendar spreads depend on exact delivery months. Dated contracts preserve the specific relationship being researched.
Move from a spread idea to transparent historical evidence
Use the live analyzer, screener and forward-curve tools to research Corn calendar spreads.
Open Futures SpreadFutures trading involves substantial risk. Futures Spread is a research and education tool. Historical patterns, rankings and backtests do not guarantee future results.