What would you consider an average execution speed? It takes me about 3-4 seconds to get a fill. Resulting in crappy fills sometimes. I live on the east coast and the brokers server is in Chicago. New computer, wi-fi. I remember getting faster fills 5 years ago.
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I got one of my better profits on a fill that took several hours\ when i called the broker he said bluntly ''dont worry about that \we are working on it+ tech trouble'' LOL funny now, but i remember thinking= good thing that was trend + not counter trend exit.


3-4 sec sounds Very excessive, even though i would not have a system that depends on good fills or thrills for profits.........................................................................
Of course counting that multi-hours exit\
my average would be much worse than 3-4 secs for that year. Me\ i'm much more concerned about liquidity, trends, trend study, more trend study/charts+ profits + average execution, over the year.
HOPE this helps it helps me; i use market order exits about 80%, mostly limit orders entry,, much more than 3-4 seconds for entry, soemetimes limits\ not filled.
No wonder Paul tudor Jones bought a farm + shoots ducks for food.