I just realized why stock prices and various assets move the way they do. It turns out that the key is about **ดีมาน ซัพพลาย** (demand and supply), which is often overlooked.

So, what exactly is **ดีมาน ซัพพลาย**? It is the clash between buying demand and selling demand in any market—whether it’s stocks, energy, gold, or even digital assets.

When prices drop, it’s not because of luck, but because selling pressure (supply) is stronger than buying pressure. Conversely, when prices rise, it means that buying pressure (demand) wins the game. These two sides are inversely related—when prices get higher, buying demand decreases; when prices get lower, buying demand increases.

For the selling side, it’s the opposite. When prices are high, they are more willing to sell; when prices are low, they slow down selling. When both sides meet at the equilibrium point, the price will stop moving—until new factors come into play.

In financial markets, **ดีมาน ซัพพลาย** is not determined by price alone. There are many other factors involved, such as liquidity in the financial system, investor sentiment, macroeconomic news, company policies, or even political situations.

A real-world example: when the Strait of Hormuz was closed, global oil supply fell by more than 20%, but energy demand (demand) remained. The result was a rapid spike in oil prices. This is called a Supply Shock.

For investors, understanding **ดีมาน ซัพพลาย** helps you predict the price direction more accurately—whether you use fundamental analysis (look at news and macro factors) or technical analysis (look at charts and support/resistance levels).

When you look at candlesticks, a green candle (closing higher than opening) indicates that demand is strong. A red candle (closing lower than opening) indicates that supply wins. A doji (opening and closing at the same price) shows that both sides clash evenly.

A popular trading approach is using **Demand Supply Zone**—look for areas where price quickly shoots up or drops down, then consolidates within a range. When new news comes in, price often breaks out of the range and continues in the same direction. That is the timing to place a trade.

Learning this isn’t difficult, but you need to try it on charts to see it clearly. **ดีมาน ซัพพลาย** is a foundation that traders and investors must understand deeply, because it is the reason any asset moves the way it does.