Secret-Identity Hunter: Characters within line of fire can’t use Alter Ego powers.

The Master of Disguise: Chameleon can use Shape Change, but is successful on a result of 4-6.

When Chameleon's trait says "within line of fire" does that mean that the character must be within 6 squares? Chameleon's range value is only 6 squares, after all.
No. There is a phrase used in Heroclix that would mean that: within range and line of fire. However, when only "within line of fire" is used, the character's range value does not matter. All that is require for "within line of fire" is line of fire; there is no maximum range.