automated trading system

Hi, does anyone know of an SPI trading platform that will automatically place trades for you based on custom indicators ?

I currently use IG, and it doesn’t appear to have that feature.

I've been building a trading system based on indicators for a few months now, and am pretty happy with the results and back testing. The problem is I'd like to use it primarily on the DJIA - however staying up all night to wait for the computer to go -beep- sell (or whatever) isn’t a lot of fun. (Although I've now using autoit scripts with some vbscript to get it to send me an SMS)

thanks
df