#selector {
    marker-width: ramp([price], range(4, 40), equal(5));
}
/*
Expected output:

#selector {
    marker-width: 4;
    [ price > 100000 ] {
        marker-width: 13
    }
    [ price > 250000 ] {
        marker-width: 22
    }
    [ price > 500000 ] {
        marker-width: 31
    }
    [ price > 1000000 ] {
        marker-width: 40
    }
}
*/