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**Probability Calculator - Evaluate the success probability for a particular trade based on volatility and expiration date. An explanation on how to use the calculator is provided.*

*Credit Spread Calculator - Evaluate the success probability of credit spreads including profit expectancy for a particular credit spread trade. An explanation of the strategy and examples are provided. Additionally, an explanation on how to use the calculator can be found by scrolling through the page.*

*Debit Spread Calculator - Evaluate the success probability of debit spreads including profit expectancy for a particular debit spread trade. An explanation of the strategy and examples are provided. Additionally, an explanation on how to use the calculator can be found by scrolling through the page.*

*Condor Calculator - Evaluate the success probability of a condor credit including profit expectancy for a particular condor trade. The calculator determines the probability that the underlying asset price will remain between both short(sell) options. An explanation on how to use the calculator is provided.*

*Straddle/Strangle Calculator - Evaluate the success probability of both a short or long straddle/strangle including profit expectancy for a particular trade. The calculator determines the probability that the underlying asset price will remain between both lower and upper breakeven prices. *

*Price Range Calculator - Evaluate the success probability of a particular asset trading within a price range based on volatility and expiration date. An explanation on how to use the calculator can be found by scrolling through the page.*