trading software!!, page-14

janus exchanges charge for live data and this has to be passed onto end user . the more things you trade on different exchanges the more it can cost . some software you can get data externally and some you need to purchase in house . at least with externally sourced data you get competition costwise . inhouse you have little choice but to pay what they charge . my software is approx 150 a month for basically everything worldwide with a couple of exceptions . i like the inhouse thing because its seemless

hope that helps