Share New Research 
hi
What is the difference between Slice class and Tradebar class.
I got an Slice error in an example I ran in lean, but when I put TradeBar in place, the program ran.
Did I miss something in the meantime or are Slice and Tradebar one thing?
Do I need to import something like
from QuantConnect.Data.Market import TradeBar
?
There is no problem with line of my code in quantconnect/terminal
def Initialize(self):
self.window = RollingWindow[Slice](500)but there was a problem in lean, and I replaced that with
from QuantConnect.Data.Market import TradeBar
def Initialize(self):
self.window = RollingWindow[Tradebar](500)
Arthur Asenheimer
Maybe just a typo, it should be TradeBar.
Regarding the difference between Slice and Tradebar: The Slice object is a more general data structure to handle various types of data (incl. TradeBars, QuoteBars, Ticks, SplitEvents, DividendEvents etc.). You can get the corresponding TradeBars from a Slice object via slice.Bars which returns a dictionary with Symbols as keys.
R.mat faridi
The material on this website is provided for informational purposes only and does not constitute an offer to sell, a solicitation to buy, or a recommendation or endorsement for any security or strategy, nor does it constitute an offer to provide investment advisory services by QuantConnect. In addition, the material offers no opinion with respect to the suitability of any security or specific investment. QuantConnect makes no guarantees as to the accuracy or completeness of the views expressed in the website. The views are subject to change, and may have become unreliable for various reasons, including changes in market conditions or economic circumstances. All investments involve risk, including loss of principal. You should consult with an investment professional before making any investment decisions.
To unlock posting to the community forums please complete at least 30% of Boot Camp.
You can continue your Boot Camp training progress from the terminal. We hope to see you in the community soon!