I'm sorry, but it seems you didn't mention my website, PNNV.com.
I'm using multiple sources, not depending on any API, connecting to different exchanges, and making an average between the prices.
That's because the gear button on top right showed only 2 sources: Bitstamp and Binance
If there are more sources then you should add them to the UI, if not try to see if you can add other sources like the ones I mentioned above.