Thank you for creating this project, it is a good development in the crypto space.
Moreover, I don't see the reason why you say it is hard to get the rating of altcoin based on trading when we have websites like coinmarketcap.com where you can check the rating of any coin as long as it has been listed on exchange and regularly getting a particular volume of trade, or is there something unique about your website ?
On CMC you can see only volume, price,... but not rating. On my site you can find much more. For example, please have a look at
https://earlybirdrating.com/ravencoin_RVN . We also watch social media activity, github commits. But the unique is the rating. We calculate rating based on increasing/decreasing price, volume, number social media posts (Twitter, FB, ...), content of social media posts,..etc.