A few questions... are you using self-serve data to upload your own close and volume data? What securities are you uploading and over what dates? When you say 'when I print out the prices, the ones that appear in my logs don't seem to match those of my dataset' what 'prices' are you printing? Are they the ones you uploaded or are you getting built in data via USEquityPricing
or data.history
or the like?
So, not sure what the specific issue is but here are a few highlights on how Quantopian handles self-serve data and built-in price data.
- Self serve data is never adjusted for splits or dividends. The data a user enters is presented unmodified to the pipeline.
- Self serve data is forward filled. Pipeline will output the last known value of a users data. If one inputs a value of 123 for a stock price on 1/1/2015, unless a new price is entered, pipeline will return 123 as the price for all dates after 1/1/2015.
- All Quantopian price and volume data is adjusted 'as of the simulation date'. In practice this means that all current (as of the current simulation day) prices are the actual prices a trader would have seen on that date.
Take a look at the self serve data docs for more on how self serve data is handled (https://www.quantopian.com/docs/user-guide/tools/self-serve#considerations)
Perhaps attach a backtest? It may be easier to troubleshoot.
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