Global switch on and off: Only timer and Only formula

Right now you have 3 ways to turn on and off global switch: "Manual", "manual and timer" and "manual and formula". For some purposes, it would be useful to add the options "Only timer" and "only formula" so that the switch, for example, can be turned on by a touch action, but not off by the same touch action.

Also, it seems that the timer doesn't work if I input a fraction of second (like 0.5). Can it be fixed?

Its because you can just select the global switch and then press formula.. then you have only formula