Source for Exponential Hull Moving Average (EHMA) formula: Raudys, Aistis & Lenčiauskas, Vaidotas & Malčius, Edmundas. (2013). Moving Averages for Financial Data Smoothing. Communications in Computer and Information Science. 403. 34-45. 10.1007/978-3-642-41947-8_4.
The Exponential Hull Moving Average is nearly identical to the Hull MA, but EMA used instead of WMA.
Credit to RicardoSantos for the existing implementation of the Hull Moving Average in pinescript: