blockchain.info irregularities

[bitcoinfan343]

Hi guys,

I recently found the following problem:

When I use the blockchain.info statistics to e.g. view the historical trading volume the values for the same date depend on the time window that I choose.

E.g.: I want to determine the trading volume for the 07.09.2017, if I use the view "last 30 days", I get 260.978 BTC, if I use the view "last 2 years", I get 264.530 BTC for the same day.
I already checked if they use different clock times for the different dates, but that cant be the reason since also the averages differ significantly.

Does anybody know, what could be the reason for these irregularities?

[SONG GEET]

Don't you know about https://coinmarketcap.com ?
They provide better statistics for almost every crypto and there is also bitcoinwisdom which is dedicted to bitcoin trading statistics.