HH (Higher High) and HL (Higher Low) are key concepts used to identify an uptrend in technical analysis. A Higher High means the price rises above the previous peak, showing buyers are willing to pay more than before, while a Higher Low means the price falls back but stays above the previous low, showing buyers are stepping in earlier during corrections. When a stock consistently forms HH and HL, it signals strong bullish momentum and healthy trend continuation. Traders often use Higher Lows as support zones and Higher High breakouts as buying opportunities, as this structure reflects increasing demand and positive market sentiment.