how to display actual value in watchlist column

[JJJJJJ11111]

i have this code it in the watchlist column's custom quote formula. it can show the number so i can sort it.

(high-low)/low*100

but when i try with vwap , there's error i can't produce anything.

#near vwap
def vwap=reference vwap();

((close-vwap)/vwap*100);

 

[SleepyZ]

i have this code it in the watchlist column's custom quote formula. it can show the number so i can sort it.

(high-low)/low*100

but when i try with vwap , there's error i can't produce anything.

#near vwap
def vwap=reference vwap();

((close-vwap)/vwap*100);

When using the def statement, a plot statement works to produce the number

#near vwap
def vwap=reference vwap();

plot x = ((close-vwap)/vwap*100);

 

[JJJJJJ11111]

When using the def statement, a plot statement works to produce the number

thanks!