The concept of "buy low, sell high" is a fundamental principle in forex trading. Traders aim to purchase currencies when prices are low, anticipating an upward movement, and sell them when prices rise for profit. This strategy requires analysis, technical indicators, and market insights to identify entry and exit points. Traders should be cautious of market trends, use risk management tools like stop-loss orders, and avoid emotional decisions. By mastering this principle, traders can capitalize on price fluctuations and potentially achieve profitable outcomes in the forex trading industry.