Have you ever wondered why asset prices go up and down like that? Mostly, the answer lies in supply and demand, which refer to the buying and selling interests—fundamental forces that drive all markets.

Let's understand it simply: supply and demand in economics mean the desires of buyers and sellers. If a stock's price drops, it's mostly because more people are selling than buying. When the price rises, it's the opposite—more people are buying than selling.

This isn't as difficult as it seems. Think of a simple example: if oil becomes scarce (supply decreases) but demand remains the same, the price will spike. This happens in stock markets, crypto, and all assets.

This basic rule is quite straightforward: low price → more buyers; high price → more sellers. Usually, prices find an equilibrium point where both sides are satisfied.

In actual investing, supply and demand refer to tools that help us understand market movements. For example, when a company's earnings are announced as good, more people buy, pushing the price up. If the results are poor, more people sell, and the price drops.

Technical analysis also uses this principle. When you see a green candlestick (closing price higher than opening), it indicates strong buying pressure. A red candlestick (closing lower than opening) shows strong selling pressure.

In real markets, factors affecting supply and demand are not just prices. There are many others, such as interest rate policies, economic growth, investor confidence, and even media news.

The key point is, if we understand how supply and demand move, we can better predict prices—whether trading stocks, crypto, or other assets.

A technique traders favor is the Demand Supply Zone, which looks for points where the price is out of balance. Then, they wait for the price to return to a new equilibrium. When clear buying or selling momentum appears, they enter trades aligned with the trend.

In summary, supply and demand are crucial for investing. They are not secret or difficult; they are natural laws of the market. The better you understand them, the smarter your investment decisions will be.