This Expert Advisor (EA) is written in MQL5 for MetaTrader 5 and is named "Nadaraya-Watson EA Fixed". It's designed to automate trading based on a custom implementation of the Nadaraya-Watson (NW) kernel smoother, which is a non-parametric smoothing technique for price data. The EA detects changes in the "color" of the smoother line (essentially, changes in its direction: rising = green, falling = red) and uses those as signals to open buy or sell positions. Importantly, it does not handle closing positions, take-profit (TP), or stop-loss (SL) — the code explicitly notes "No TP/SL - Exit managed by other EA", so it's meant to be paired with another tool or EA for exits.
The EA runs on every tick but only performs actions on new bar openings (e.g., when a new candle forms on the chart). It supports hedging (allowing simultaneous buy and sell positions) and has basic risk controls like lot size and minimum bars between trades.