Looking for FX live alerts system by % change

Hi, I’m looking to track a few different currency pairs and I’d like to receive live alerts every time the spot price strays x% from previous day’s close. Does anyone know of a market data system that could do that, apart from Bloomberg?

All the ones I’ve seen online provide alerts if spot goes below a certain pre-defined level, but I need the threshold to be a relative change vs previous day.

Thanks in advance!