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# neural-forecasts
Slackbot
04/27/2023, 1:27 PMThis message was deleted.
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Cristian (Nixtla)
04/27/2023, 1:54 PMHi @Rachel Yee! In time series forecasting it is crucial to avoid information leakage, that is, when doing a forecast we can only use the available information at that time. We have the historic/future variables division to allow for different types of covariates, depending if we know their future values or not.
Cristian (Nixtla)
04/27/2023, 1:58 PMFor instance, if today (04/27) you are doing the daily fuel sales forecast for tomorrow (04/28), and you know the prices for tomorrow, then they are future exogenous variables. The models can use the tomorrow's price to produce the forecast. If you only have past values of the prices (up to 4/27), then they should be historic variables
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Rachel Yee
04/27/2023, 1:59 PMAh I see! Thank you!