I use Sierra, currently only have current price line, does anyone know if I can stack multiple charts ontop of each other?
Sierra Chart can do literally anything. It's just so complicated it takes a while to learn and get it configured properly. Each technical chart I added had an option to be overlayed, or below, or anywhere really. So I'm pretty sure you could do that with a whole different feed if that is what you are asking. It's sort of like excel, where you have a feed, then a chartbook as the next layer up, then a layer on top of that called workbook or something like that.