This is one of Jim Dandy's creations from a couple of his Tech Tip Tuesday YouTube videos from April 2020. It's an on-chart moveable button where you can change the background colour, set up for now between black and white. On the face of it, it may not be that interesting in terms of basic function but this can play a spoken message of your choosing before the chart changes colour. Clearly it can be programmed to do other things instead.

It uses Microsoft's free download ReadAloud software.

The spoken message can be changed on lines 89 and 95 of the mq4 file. The dll, contained in the zip for ease of downloading, needs to go to the MT4 libraries folder. The dll is the work of The Coder's Guru and has come from the mql5 site. The speak.mq4 file is also from there & included but it wasn't needed for the ButtonDialogue file to work. I compiled it and it works OK. Included the ex4 just in case.