The channel: Forecast and Levels - Mini-articles with technical and fundamental analysis on the way as forecasts and levels - with good indicators uploaded as the source codes together with the charts - https://www.mql5.com/en/channels/forecast
The other channel: Something interesting and usefull about Metatrader and services - https://www.mql5.com/en/channels/interesting (this is the channel about something interesting - with my point of view).
The other channel to subscribe - to be first to know about some news for example: the best publications of the largest community of algotraders - https://www.mql5.com/en/channels/algo-trading-en (this channel is already having more than 150 subscribers)
How to create a simple Multi-Currency Expert Advisor using MQL5 (Part 4): Triangular moving average - Indicator Signals - https://www.mql5.com/en/articles/13770