Hi,

I want to add some custom data feed for backtest. 

But i couldn't succeed it. There is a documentation about this. 

https://www.quantconnect.com/lean/documentation/topic16.html

There is a part how to do this (hard method)

There is a link here for tutorial but it is broken:

https://www.quantconnect.com/lean/documentation/5cbabb50-d4d0-4da4-9565-dff9e3a142ae

How can i write a datafeed class like filesystemdatafeed.cs and feed data from custom source for backtest?

Is there an easy example?

Thanks,

Author