Just found thread about this indicator https://www.mql5.com/en/forum/173022
Right mouse click on SMMA-Crossover_Signal.mq4 file, select/click "Save as" and save this file to your computer.
Some people reported the same yesterday (or 2 days ago). Probably it was some server problem.
It should be no problem now.
All stochastic EAs are here https://www.mql5.com/en/forum/177239
Try to find something.
Some other threads related to this subject.
- Thread is here;
- Alerter indicator: this post and this thread.
- Price alert aka JC - Line Break Alert indicator is here.
You even can play the music from cartoon films but i am not a coder sorry.
Look at this thread https://www.mql5.com/en/forum/general (it should be some 1 or 2 indicator with alarm/alert).
As many people asked for 'alert-only-once' examples so I am using this indicator as an example. This alert code was done by someone on this thread (sorry, don't remember the name of good coder).
A thing that comes to mind is one of those alerts that pop-up with text, but idk how find or make one. I searched the forum here and can't find smth like that.
Look at this htread https://www.mql5.com/en/forum/173589 may be you will find something.
MACD with alert and email is on this post https://www.mql5.com/en/forum , this post https://www.mql5.com/en/forum/174975/page207 , alert is on this post https://www.mql5.com/en/forum , this post https://www.mql5.com/en/forum and this post https://www.mql5.com/en/forum and this one https://www.mql5.com/en/forum
All about MACD (systems, indicators, EAs etc) are on this thread https://www.mql5.com/en/forum/178018
All about PSAR is here https://www.mql5.com/en/forum/177358 incl alert: this thread, this post and this thread.
Just for information.