questions about Tick Data

 

I understand the tick data from different brokers are different.

But the data get from tickdata downloader of  StrategyQuant is same for all brokers.

Can I use it for certain broker? Which broker is the tick data of StrateyQuant same as or from?

 

Besides, how about tick story? The spreads defined in tick story are not variable as live account too.

How to resolve these issues or concern?   

 
As far as i know, here can fing long tick story https://www.algoseek.com/.... 5 min 1 min bars!
Historical tick data - Equities data, Futures data & Options data | AlgoSeek.com
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The tick data of tickdata downloader is from dukascopy 
Reason: