Quote from wrbtrader:
I use three different data sources. Its not uncommon for me to see my charts of the exact same trading instrument, exact same time frame to have some intervals different in comparison to the other data vendor I'm using.
I concluded the difference due to the data vendors getting their data from different sources, difference in sending the data after receiving it and difference in how my ISP provider streams the data to me (one of my chart programs is on my backup computer via a different ISP).
Thus, some types of TA (e.g. Japanese Candlestick Analysis) should in theory have different patterns as I noted with examples in my own candlestick analysis thread here at ET many years ago when comparing my charts to the charts of others of the same trading instrument via the exact same time frame.
This isn't just a problem amongst lower tier data vendors. Its also a problem amongst top tier data vendors like Bloomberg and CQG. I've had trading pals send me charts of the exact same trading instrument and I would see a few intervals on the charts with slightly different data when comparing Bloomberg to CQG.
Different types of charts is "more apparent" in the forex industry in comparison to futures industry when comparing one data vendor to another data vendor.
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Regardless, I don't care if some TA is subjective and other types of TA is objective. At the end of the day only one thing really matters...did I profitably use the TA within my trading plan and can I consistently do such again.
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