You stated "Tradier API for market data". As far as I know, any market data that you get from a provider is FOR YOUR OWN PERSONAL USE ONLY, AND YOU ARE FORBIDDE

You stated "Tradier API for market data". As far as I know, any market data that you get from a provider is FOR YOUR OWN PERSONAL USE ONLY, AND YOU ARE FORBIDDEN TO REDISTRIBUTE IT IN RAW OR PROCESSED FORM. I'm willing to bet you are violating a license agreement (and cartel of market data providers but that's another story) and won't be long until you either: 1) Shut down your website. 2) Are facing a lawsuit which will have you pay through the nose. Think working the rest of your life to pay for "infringement". Every now and then I see some naive schmuck pulling a "free market data!" website, which lasts a couple of weeks till they find out what they're dealing with.