Use these links and set them to weekly:

https://bitcoinwisdom.com/markets/cryptsy/drkbtc

https://cryptowat.ch/poloniex/dashbtc/1w

Alternatively, set this to all:

http://coincap.io/#/coin/dash

https://www.coingecko.com/en/market_cap/dash/usd/max_days

http://coinmarketcap.com/currencies/dash/#charts

One of them should certainly be sufficient.