StockSharp - trading and algorithmic trading platform

## Index |

IndexEditor - Graphic control for ExpressionIndexSecurity editing.

ExpressionIndexSecurity - is a special type of index instrument, based on combining several instruments using mathematical formulas. This type has the Expression property, which stores the formula in a text form and the list of underlying instruments InnerSecurityIds. To calculate a mathematical expression, the NCalc library is used.

**Main properties**

Securities - all available instruments.

Formula - the mathematical formula of the index.