When the ECN goes between a few prices over and over, they often don't move the prices on the MT4 broker side. Say the spread is 3 pips, and the price keeps changing on the ECN 0.5 to 2 pips, the price on MT4 often won't change. When the ECN pushes an upper boundary, the MT4 price changes.
Here is some ECN tick data. The large numbers are orders in dollars.
Quote:
Curr Time Date Bid Bid Vol Ask Ask Vol LastPrice
GBP/USD,17:15:42,05/13/2007,1.9822,7000000,1.9827,12000000,1.9827
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17:15:42, Bid 1.9822 with 70 lots, Ask 1.9827 with 120 lots
That isn't to say that there isn't lag, it just means the price didn't move out of the broker's spread. Not bad, but not precisely accurate either.
Quote:
GBP/USD,17:13:39,05/13/2007,1.9824,5000000,1.9827,2000000,1.9827
GBP/USD,17:13:39,05/13/2007,1.9822,7000000,1.9827,2000000,1.9822
GBP/USD,17:13:40,05/13/2007,1.9822,2000000,1.9827,2000000,1.9822
GBP/USD,17:13:40,05/13/2007,1.9822,2000000,1.9827,7000000,1.9827
GBP/USD,17:13:41,05/13/2007,1.9822,2000000,1.9827,12000000,1.9827
GBP/USD,17:13:41,05/13/2007,1.98215,2000000,1.98265,2000000,1.98265
GBP/USD,17:13:44,05/13/2007,1.9822,5000000,1.98265,2000000,1.9822
GBP/USD,17:13:45,05/13/2007,1.9822,7000000,1.9827,7000000,1.9827
GBP/USD,17:13:45,05/13/2007,1.9822,7000000,1.9827,2000000,1.9827
GBP/USD,17:13:55,05/13/2007,1.9822,2000000,1.9827,7000000,1.9827
GBP/USD,17:13:56,05/13/2007,1.98215,2000000,1.98265,2000000,1.98265
GBP/USD,17:14:40,05/13/2007,1.9822,2000000,1.9827,7000000,1.9827
GBP/USD,17:14:41,05/13/2007,1.9822,2000000,1.9827,2000000,1.9827
GBP/USD,17:14:42,05/13/2007,1.9822,2000000,1.9827,7000000,1.9827
GBP/USD,17:14:42,05/13/2007,1.98215,2000000,1.98265,2000000,1.98265
GBP/USD,17:15:00,05/13/2007,1.9822,5000000,1.9826,5000000,1.9826
GBP/USD,17:15:42,05/13/2007,1.9822,5000000,1.98265,2000000,1.98265
GBP/USD,17:15:42,05/13/2007,1.9822,7000000,1.9827,12000000,1.9827
GBP/USD,17:15:43,05/13/2007,1.9822,7000000,1.9827,7000000,1.9827
GBP/USD,17:15:44,05/13/2007,1.9822,7000000,1.9826,5000000,1.9826
GBP/USD,17:15:44,05/13/2007,1.9822,5000000,1.9826,5000000,1.9822
GBP/USD,17:16:44,05/13/2007,1.9822,5000000,1.98265,2000000,1.98265
GBP/USD,17:16:44,05/13/2007,1.9822,7000000,1.9827,12000000,1.9827
GBP/USD,17:16:45,05/13/2007,1.9822,7000000,1.9827,7000000,1.9827
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