Help, enter position.

[ea_mt4]

Hello, I can not set the sales position.

My expert enters long if high is greater than the n opening and sells low value if the opening is less than the value n.

my code. 

if ((High [0] -Open [0]> 20 * Point)) return ("buy"); // buy signal
if ((Low [0] -Open [0]> 10 * Point)) return ("sell"); // sell signal

because the condition of sale does not work?

[Keith Watford]

Low [0] -Open [0] can never be bigger than 0

[ea_mt4]

how do I fix? 

[honest_knave]

ea_mt4:

how do I fix? 

if ((Open [0] - Low[0]> 10 * Point)) return ("sell"); // sell signal

[ea_mt4]

thank you so much