i wish you guys could make it work on manual update
Since we, as avast! users here, do not create and set up the a/v program, we cannot set it up so that it will work on manual update.
Why the specific issue or request? As DavidR says, only automatic updates will bring you the streaming updates.
Streaming updates are for specific malware definitions and detections that cannot wait until the next main update comes in. To remove any confusion, they are not emergency updates, but they will, when applied, provide a higher level of resident protection for you than you would get otherwise. As such, they are only temporary, and are removed, when the next main update is downloaded.
Seems your approach may result in lesser protection for you, not greater, and would result in more work for you anyway by having to check more frequently as well.
Main updates come in only two to three times a day.