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# Introduction

This page is provided as a demonstration of RTD formulas categorized by security type as well as syntax type. This will help to provide context on how a unique contract type should be formatted for either Simple or Complex syntax structures. The generic structure of a Contract is as follows:

`Symbol@Exchange/PrimaryExchange/SecType/Expiration/Right/Strike/Currency`

**Note:** TradingClass, Multiplier, and LocalSymbol can only be specified through Complex Syntax.