Creating a stock market

As-salamu-alykum, i am looking to open a trading platform where if anyone wants to use my software they have to pay a fixed monthly fee and commission on their trades. Is this halal? i do not trade stocks i only offer my platform as a service. I myself am not investing in haram stocks i am only charging investors/traders for using my platform to trade. Also, in order to create a fast stock trading platform, i send the trades to a company that processes them and for every trade, I charge the company a small fee. Is this halal? I still do not earn money from investing in any haram stocks i am just charging people if they want to use my particular platform. Like someone renting a commercial house, and that person chooses themself to do haram, earn haram money and pay me. therefore i am wondering if this is permissable.