#ifdef name

#ifndef name

#else

#endif

Defined names can be used to to skip certain script lines dependent on previous #defines. All script lines between #ifdef and #endif are skipped if name was not defined. Likewise, all lines between #ifndef and #endif are skipped if name was #defined. The #else statement reverses the line skipping or non-skipping.

Example: 

#define SCALPING
... 
#ifdef SCALPING
  aut.nBarMinutes = 0;
#endif

See also:

#define ► latest version online