Financial markets operate on simple yet profound principles: supply and demand, or what is commonly called the law of supply and demand. From my years of market observation, I notice that this principle drives everything—from stock prices, gold, energy, to digital assets. Despite numerous global events, the supply line and trading forces remain the true drivers.

In essence, demand is the desire to buy, while supply is the desire to sell. It seems simple, but upon deeper reflection, there's a lot hidden beneath. When we plot this demand on a graph, we get the demand curve and the supply curve, each point indicating how many people want to buy or sell at that price.

An important point I want to emphasize is the law of demand, which states that when prices rise, the desire to buy decreases. Conversely, when prices fall, the desire to buy increases. Why is this? There are two factors: income effect—when prices drop, our money becomes more valuable, allowing us to buy more—and substitution effect—when prices are lower, we tend to buy this item instead of others.

As for the supply curve, it works the opposite way. When prices rise, sellers want to sell more. When prices fall, sellers are less willing to sell. A clear example is the oil market in March 2026, when the Strait of Hormuz was closed, reducing global oil supply by over 20%. Meanwhile, demand remained the same. The result was a rapid price spike. This is a clear supply shock. The supply curve shifts leftward, causing prices to surge.

However, actual market prices are not determined solely by supply or demand alone but by the equilibrium point where the demand and supply curves intersect. At this point, price and quantity tend to stabilize and remain unchanged. If the price moves above this point, sellers will want to sell more, but buyers will want to buy less, leading to excess inventory and downward pressure on price. Conversely, if the price drops below equilibrium, buyers want more, sellers want less, leading to shortages and upward price movement.

Now, I will try to explain how this relates to investing. In financial markets, many factors influence demand, such as economic conditions, interest rates, and investor confidence. When interest rates are low, more money circulates in the system, prompting people to seek returns in the stock market. Demand for stocks increases. Factors affecting supply include corporate decisions to raise capital or buy back shares, IPOs of new companies, and market regulations.

In fundamental analysis, I see that when stock prices rise, it reflects strong demand or buying pressure. Conversely, when prices fall, it indicates strong supply or selling pressure. These factors often stem from earnings forecasts, company growth, or structural changes affecting profits.

In technical analysis, I use various tools, such as candlestick analysis. For example, a green candlestick (closing higher than opening) indicates buying strength overcoming selling pressure. A red candlestick (closing lower than opening) shows selling dominance. If the candlestick is doji, with open and close near each other, it suggests indecision between buyers and sellers.

Trend analysis is also crucial. If prices make new highs, demand remains strong. If they make new lows, supply is dominant. When prices are within a range, both sides are balanced. Support and resistance levels are often where buying interest is concentrated at support, and selling interest at resistance.

A popular technique is the Demand Supply Zone, which assesses price momentum to identify when the market is out of balance. I observe that rapid price movements—either upward or downward—reflect excess demand or supply. After such moves, prices tend to consolidate. When opposing forces gain control, the trend reverses.

Two common patterns I see are DBR (Demand Zone Drop Base Rally), caused by excess supply—price drops sharply, then consolidates; when buying wins, prices rally. RBD (Supply Zone Rally Base Drop), caused by excess demand—price rises sharply, consolidates; when selling wins, prices fall.

In reality, continuation trends are more common than reversals. I find that RBR (Rally Base Rally) in uptrends and DBD (Drop Base Drop) in downtrends frequently occur. When new factors emerge, demand or supply in the same direction often regain strength, and prices continue their previous trend.

In summary, the principles of supply and demand are not just economic theories but practical tools that traders and investors can use to analyze and forecast price movements. The supply and demand lines, equilibrium points—these are all real market phenomena. I encourage everyone to study and test these concepts with real prices. When you can visualize these, it will forever change how you perceive the market.