Value ZIGZAG

 
Hello, I'm new and I do not speak English (thanks google translation) 
Looking desperately, in the recovery of 20 last value up and down zigzag stitches.

I try to rélaiser a table: 
hight [0]: 1.10515 
hight [1]: 1.10286
hight [2]: 1.10415
hight [3]: .... 
... 
... 

Low [0]: 1.08897 
low [1]: 1.06125 
low [2]: 1.04619 
low [3]: .... 
... 
... 

Can you help me? 
thank you
 
Can you help me?