measure up-wick and down-wick

[saeed123]

Hello,
I want to measure up-wick and down-wick for each candle.
for example if each candle has wick more than 50 pips,
draw a arrow on it.
how do i do it?

[jstap]

Single candle template, 1 4 top, 1 4 bottom connected to a draw arrow block.