buy low, sell high

Usage notes

 * Often used in a humorous manner, since this advice is too trite and vague to be helpful in specific situations.

Translations

 * Arabic:
 * Libyan Arabic: إشري اليوم بالرخيص و بيع غدوا بالغالي
 * Chinese:
 * Mandarin: 低買高賣
 * Hungarian: vedd meg olcsón, add el drágán