Gunfight at Red Sands

Gunfight at Red Sands is a 1963 Spaghetti Western starring Richard Harrison. The brilliant Ennio Morricone (who still performs at age 85) did the music. Although Morricone was given an honorary career achievement Academy Award, he has strangely not won an Academy Award for any of his film scores. This is a good spaghetti western. In this one the foolish younger brother indiscreetly shows off the family's gold to the evil gringo card cheats. The sister is angry. The elder brother is the hero of the piece.

from the theme song:

"Keep your hand on your gun.
You can't trust anyone."

via youtube:

Spaghetti-Western.net says it's "a simple film, but possibly the best of the European pre-Fistful westerns." Images Journal calls it a "notable film" of the period.