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Interpretation of FX Tick Data

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 Yuan Qing Lim, Global Markets Structuring - Junior Equities Structurer / Dealer at United Overseas Bank Limited (UOB)

 Wednesday, June 21, 2017

Hi all, Would like to better understand how OnTick events are triggered on trading platforms (e.g. MT4). As I am currently going through the tick data that I have extracted from MT4, have observed the following data set: Time Open Close High Low Volume Bid Ask 2017.06.21 14:08:00 0.75692 0.75696 0.75696 0.75691 19 0.75691 0.75702 2017.06.21 14:08:00 0.75692 0.75695 0.75696 0.75691 21 0.7569 0.75702 2017.06.21 14:08:00 0.75692 0.75695 0.75696 0.75691 22 0.7569 0.75701 2017.06.21 14:08:00 0.75692 0.75698 0.75698 0.75691 23 0.75693 0.75704 2017.06.21 14:08:00 0.75692 0.75699 0.75699 0.75691 24 0.75694 0.75707 2017.06.21 14:08:00 0.75692 0.75701 0.75701 0.75691 25 0.75696 0.75707 2017.06.21 14:08:00 0.75692 0.757 0.75701 0.75691 26 0.75695 0.75707 2017.06.21 14:08:00 0.75692 0.757 0.75701 0.75691 27 0.75695 0.75706 2017.06.21 14:08:00 0.75692 0.757 0.75701 0.75691 28 0.75695 0.75707 2017.06.21 14:08:00 0.75692 0.75702 0.75702 0.75691 30 0.75697 0.75708 2017.06.21 14:08:00 0.75692 0.75701 0.75702 0.75691 31 0.75696 0.75707 2017.06.21 14:08:00 0.75692 0.75701 0.75702 0.75691 32 0.75696 0.75708 Was wondering if the following's correct: - each tick data point is generated for every unit of volume (in this case I believe it is for every 100,000 units of currency traded) - as such, open, close, high and low prices refer to traded prices for that 1 unit of volume - hence, open, close, high and low prices could be bid or ask prices, depending on which one was hit for that particular unit of volume Any help would be appreciated. Thank you! ** Gaps of volume = 20 and volume = 29 is likely due to data coming in before the program had time to finish writing the previous data points to disk.


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