Ichimoku code generating error in Pi

Algos, strategies, code
1

Hi all
I’m using the the below given code for ichimoku yet is giving error

for Buy
SET C = (SMA(HIGH,9)+SMA(LOW,9))/2

SET D = (SMA(HIGH,26)+SMA(LOW,26))/2

SET A = (C+D)/2

SET B = (SMA(HIGH,52)+SMA(LOW,52))/2

CROSSOVER(A,B)