Great project, sorry about the unavailability of cheap price data for the consumer segment.
Professional data is expensive, and one-person companies are not on the radar of data vendors and exchanges, who try to make big contracts e.g. with national banks abd brokerages, who then make that data available to their customers via Web portals. The quality of financial data isn't very good even if you pay a lot.
If your project had been a startup, you would have had to check whether your assumptions apply ahead of building out your front-end and incorporating, ideally: "Can you build it for an acceptable price?" (factoring in the data licensing cost) & "Will they buy it for the price (+ your margin) that you can build it?"
Professional data is expensive, and one-person companies are not on the radar of data vendors and exchanges, who try to make big contracts e.g. with national banks abd brokerages, who then make that data available to their customers via Web portals. The quality of financial data isn't very good even if you pay a lot.
If your project had been a startup, you would have had to check whether your assumptions apply ahead of building out your front-end and incorporating, ideally: "Can you build it for an acceptable price?" (factoring in the data licensing cost) & "Will they buy it for the price (+ your margin) that you can build it?"