LED setup, signal strength

I’m using 411GL.
There have 5LED, I wish to use to indicate signal strength.

For example,
4 LED lighted: signal is strong
3 LED lighted: signal is good
2 LED lighted: signal is normal
1 LED lighted: signal is bad.

I tried many time, but I couldn’t do.
How set signal strength parameter ?

Use this command to configure LEDs for signal strength:

/system led add disabled=no interface=wlan1 leds=led1,led2,led3,led4,led5 type=wireless-signal-strength

it is only work in station mode.

I wish it work at AP mode also.