Fix thinkscript code error

I have this thinkscript error [login to view URL] The code block referenced in that line is here: Plot scan = if (!Buy[1] and !Buy[2] and !Buy[3] and !Buy[4] and !Buy[5]) then 1 else 0 else if (!Sell[1] and !Sell[2] and !Sell[3] and !Sell[4] and !Sell[5]) then-1 else 0;