As Bitgov mentioned in the previous post, we selected a few major exchanges that we can trust as our data source: https://www.cryptingup.com/exchanges
Trading volume is an important factor, not only in the ranking but also in the price calculation which is based on volume weighted average. We plan to integrate with more exchanges in the future and assign a confidence score to each. Exchanges with higher score will have more influence in the price calculation.

Thank you for your feedback.
We are working to add more data feeds to calculate market capitalization.
Ranking numbers: thanks for your observation, we will add that additional column

www.CryptingUp.com

We provide accurate and up to date cryptocurrency data across the exchanges and markets listed in our website.

Features:

• Automatic cryptocurrency listing
• Prices are re-calculated every minute
• 1h, 24h, 7d price change
• 24h volume
• Market capitalization
• Ranking by 24hr volume
• Watchlist to follow specific cryptocurrencies
• Create a public profile and share your watchlist
• Users can post information on their profile and cryptocurrency pages
• Mobile friendly

Our website supports the following exchanges:
https://www.cryptingup.com/exchanges

To view the full list of cryptocurrencies visit:
https://www.cryptingup.com/assets

If you would like to find out more our methodology (how the data is aggregated and price calculation):
https://www.cryptingup.com/methodology

We are looking forward to make a good contribution to the cryptocurrency space.

Follow us on https://twitter.com/CryptingUp