I have created this Free MT4 EA to test if it is more profitable to trade in favor of the mass sentiment of traders or it is better to go against it.
Check the video:
The EA is multi-currency and open or close orders based on the website:
Remember to authorize this url in WebRequest options in MT4
You can choose any currency pairs you want (I recommend major pairs with less spread) as long as you have them active on MT4 Market Watch.
If the EA is configured to trade in Favor of Market Sentiment, it will open trades in currency pairs that are equal to or higher than the default percentage value chosen (Default 80, but you can choose the percentage you want) and close if it goes down. at 50%
If you want to choose to trade Against of Market Sentiment, suppose that the market sentiment is more than 80% Long in EURUSD, then the EA would open a sell order in EURUSD and the order would be closed when the Long drops to 50%
Leave your comments and suggestions, how are you more profitable, operating for or against, with what percentages and any questions, let me know 
Forex Sentiment Trader FREE EA 1.177 by Winidecorw.ex4 (338.4 KB)
Regards!