T3 is a technical indicator developed by Tim Tillson, who is known for his work in the field of technical analysis. T3 stands for Tillson's Moving Average. It is a type of moving average that aims to reduce the lag often associated with traditional moving averages.

The T3 indicator is designed to smoothen price data and identify trends more effectively. It uses multiple exponential moving averages (EMAs) and applies a smoothing process to reduce noise and provide a clearer signal. The smoothing is accomplished through a combination of multiple EMA calculations.

By reducing lag and smoothing price data, the T3 indicator can potentially help traders and analysts identify trend reversals and generate buy or sell signals. It is commonly used in technical analysis to complement other indicators and trading strategies.