有没有人试过eSignal OnDemand这个eSignal旗下最廉价的解决方案? http://www.esignal.com/ondemand/pricing.aspx 有一句“ This service is not available for use with third party software applications. ” 可是eSignal OnDemand 和 eSignal (Premier) 用的是同一套软体,MC是不是真的没办法从eSignal OnDemand读取historical data?