Navigation: Realtest Script Language > Syntax Element Details > Product Category Multi-Bar Functions Description Product of values Syntax Product(expr, count) Parameters expr - data series formula count - lookback period Notes Evaluates expr for each of count bars and returns the product of the values. This function supports one-pass calculation when used in the Data Section with a non-variable count. Example CumRet: Product(1 + ROC(C, 1) / 100, 20) - 1 Compound return over 20 bars, equivalent to ROC(C, 20) / 100. Copyright © 2020-2026 Systematic Solutions, LLC