Formulaic Alpha Analysis: Operators, Time-Series Functions, and Inputs

Summary

This guide explains a formula tool for rapidly calculating and checking trading ideas using expressions based on publicly available WorldQuant Alpha101 methods. It lists arithmetic and conditional syntax, cross-sectional ranking, lagging, moving averages, correlation and covariance, scaling, changes, weighted decay, rolling extrema, rolling ranks, sums, products, and standard deviation. It also describes market-series inputs such as returns, OHLC prices, and volume.

The guide notes that expressions are case-insensitive, can use an instrument selected in the interface or a directly named instrument, and can return multiple plotted results. It flags several limitations: industry neutralization is unsupported, and VWAP, market capitalization, and industry classification are not implemented as described; VWAP currently uses close price. The text documents syntax and available inputs, but provides no factor-performance evidence, testing protocol, or guidance on avoiding data leakage or overfitting.

Key ideas

• The tool provides formula syntax modeled on Alpha101 for computing and checking trading ideas.
• Its operators include cross-sectional and time-series ranks, rolling statistics, correlations, scaling, and weighted decay.
• Inputs include returns, open, close, high, low, and volume series.
• Some functions and data fields are unsupported or approximated, including industry neutralization and VWAP.
• Multiple expressions can be output together, and the guide gives no evidence about trading performance.

Tags

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.