Have you ever wondered why stock prices go up and down like that? Mostly, it all comes down to a simple concept: supply and demand, which is the buying and selling interest that occurs in the market. Whether it's stocks, gold, or even digital assets.

Think about it: when more people want to buy a product but there's limited supply, the price will go up. Conversely, if many people are selling but no one is buying, the price will drop. That’s the game of the market.

Take an example from the current situation: when the Hormuz Strait was closed last March, about 20% of the world's crude oil passing through that point disappeared from the market immediately. This caused a supply shortage of oil, while the demand for energy remained the same. The result was a rapid spike in oil prices due to the scarcity of the product.

In the financial markets, this is a bit more complex. Stock demand isn't just driven by price but also by macroeconomic factors such as interest rates, economic growth, and investor confidence. When interest rates fall, investors seek higher returns in the stock market, increasing demand. As for supply, it depends on company decisions like issuing new shares or share buybacks.

For traders, understanding this helps a lot. When you see a green candlestick (closing price higher than opening), it indicates buying pressure has beaten selling pressure. A red candlestick (closing price lower than opening) shows selling pressure has overtaken buying. If the trend shows the price making new highs consistently, it indicates strong demand, and prices are likely to continue rising.

There’s a technique called Demand Supply Zone used to identify support and resistance levels. When the price breaks out of a support zone, it signals strong buying interest. When it breaks through resistance, it indicates selling pressure has won.

In summary, it’s that simple: supply and demand are the keys to understanding the market. Whether you're doing fundamental or technical analysis, understanding this concept will help you read the market better and make smarter investment decisions. The key is to practice and study real market data.