• TraceBackward is an option for Trace and related functions which specifies whether to include preceding expressions on the evaluation chain that contains the pattern form sought.
• TraceBackward -> True includes the first expression on the evaluation chain that contains form.
• TraceBackward -> All includes all expressions before form on the evaluation chain that contains form.
• TraceBackward allows you to see the previous forms that an expression had during an evaluation.
• New in Version 2.