Arbitrage trade between brokers?

[heispark]

When I compare 1 minute chart of /NQ between CQG (AMP Futures, TradingView) and Thinkorswim (TD Ameritrade), TOS always 0.5-1 second lags to CQG. Is this only delayed display? Or is TOS's data/execution actually lagging? If this is the case, I think someone can take advantage of this lagging to do some arbitrage trade. Actually, DOM is changing much faster in CQG than TOS. It looks CQG sends more data. What do you think?

 

[guru]

That would be true if you were buying futures from CQG and selling them to TOS.
But all they do is display data and send your orders to the exchange, where the price is always consistent/same at specific point in time. So knowing the actual price before TOS displays it doesn’t make any difference.

 

[MattZ]

CQG may provide unfiltered data while TD may have aggregate data and when the markets are fast you may see the difference in data between the two.