Why is the Signal List inside MT4 bigger than on MQL5 Website

There are all sorts of Signals listed in MT4 that I can’t find here:

Why the discrepancy?

For example, the highest return signal that everyone of course is subscribing to, “North East Way” cannot be found when I search North East with no filters!??

I know that there are a lot of traders who take advantage of the signals they get from several websites. But as I had a bad experience with a signal provider in the past, I prefer not to use them. Can you help me find out how to know that a signal provider is worth trusting and which one I should avoid.