Completely different tick data in USD/CHF (and possibly others)
Posted: Fri Nov 19, 2021 10:52 am
While I was browsing my data, I found out that JForex App would show me no tick data for certain timeframes, i.e. 17.05.2019 in USD/CHF.
Jforex is configured to use the same folder (.cache) I download my Dukascopy data into with Tickdata.
I also tried the Official downloader from dukascopy with the result, that it would create a lot of empty csv files when trying to output tick data as csv.
So I configured JForex to use another, empty folder as .cache to force it to redownload data. Now it downloads the data and displays it. Here is the concerning part: Tickdata from my big downloaded folder is very different to the newly downloaded ticks. The old data was downloaded in december 2019, 19h_ticks.bi5 is 16.223kb big. The newly downloaded 19h_ticks.bi5 is 66.48kb big. Both from their respective USDCHF\2019\04\17 folder.
So in summary:
File sizes do not match up for data from 2019 to currently downloaded data
The official JForex Trader cannot read the old files, but can download and display new ones for the tested time
So I assume that dukascopy has changed its tick data. Which to me is very concerning. Does anyone have more information on this? Why did they do that? Is the new data more accurate or just a different data source? If they used their own data for their charts, why would it get changed years later?
Thanks!
EDIT: I have previously stated that the data also looks very different on charts but that was a mistake by me, the data looks similar.
Jforex is configured to use the same folder (.cache) I download my Dukascopy data into with Tickdata.
I also tried the Official downloader from dukascopy with the result, that it would create a lot of empty csv files when trying to output tick data as csv.
So I configured JForex to use another, empty folder as .cache to force it to redownload data. Now it downloads the data and displays it. Here is the concerning part: Tickdata from my big downloaded folder is very different to the newly downloaded ticks. The old data was downloaded in december 2019, 19h_ticks.bi5 is 16.223kb big. The newly downloaded 19h_ticks.bi5 is 66.48kb big. Both from their respective USDCHF\2019\04\17 folder.
So in summary:
File sizes do not match up for data from 2019 to currently downloaded data
The official JForex Trader cannot read the old files, but can download and display new ones for the tested time
So I assume that dukascopy has changed its tick data. Which to me is very concerning. Does anyone have more information on this? Why did they do that? Is the new data more accurate or just a different data source? If they used their own data for their charts, why would it get changed years later?
Thanks!
EDIT: I have previously stated that the data also looks very different on charts but that was a mistake by me, the data looks similar.