Ploting an increasing volume

[Winnie]

What is wrong with this ?
if (Volume() > Volume()[1])
............
Why there is an error in compiling ? Is any suggestion in comparing volume ?
Thanks

[NinjaTrader_JoshP]

You are trying to compare the whole volume series against a single volume value. You cannot do this. You need to compare values to values.

if (Volume[0] > Volume[1])

Also, note that I am not using ().

[Winnie]

Thanks for your kind help.

[Winnie]

Dear Josh,
How about Range ?
I use the following code to compare Range and it works fine.
if (Range()[0] > Range()[1])
.........
Why this time I need to add () after Range?
Anyway thanks for your support

[NinjaTrader_JoshP]

Volume[] is a series already defined. Range() is an indicator.