Many traders (newbies) are asking the question about the trading system or simple indicator to start trading (at least on demo for example). So, there is one the main/key Signal systems' thread (mostly for MT5): Trading Systems Based on Signal Indicators - https://www.mql5.com/en/forum/10741
The announcement: Support for older MetaTrader 4 and MetaTrader 5 versions to end on December 1 - https://www.mql5.com/en/forum/475122 The minimum supported versions for now: - MetaTrader 4 build 1420, released on May 24 - MetaTrader 5 build 4410, released on June 21
Data Science and Machine Learning (Part 25): Forex Timeseries Forecasting Using a Recurrent Neural Network (RNN) - https://www.mql5.com/en/articles/15114