It is clear that even amidst global changes, the fundamental principles driving asset prices across all types remain the same. Whether it's stocks, energy, gold, or even digital assets, they all depend on the same principle: demand is the desire to buy, and supply is the desire to sell. These two forces are considered the most basic gears in determining market prices.

But what exactly is demand, and how can we apply it to investing? Let's understand it simply.

Simply put, demand is the desire to purchase goods or services at various prices. When we plot this demand, we get the demand curve that shows us how much people want to buy at each price. Supply, on the other hand, is the desire to sell goods at different price levels, and its curve shows us how much sellers are willing to offer at each price.

What’s interesting is how they relate to price. When prices rise, demand tends to decrease, but supply increases. Conversely, when prices fall, demand increases, but supply decreases. This is called the "law of demand" and the "law of supply."

This happens due to two factors. First, when prices change, our purchasing power also changes (the income effect). Second, changing prices make us compare the goods to similar products (the substitution effect). Both influence our buying decisions.

However, price isn't the only factor affecting demand. Other factors include our income, preferences, the number of consumers, and future price expectations. Currently, we also see that unexpected events like wars or crises can significantly impact demand. For example, when oil transportation routes are shut down, oil demand spikes unexpectedly.

Supply refers to the selling side. It’s not solely dependent on price; production costs, technology, the prices of substitute goods, the number of competitors, and even tax policies all influence how much sellers want to offer.

The key point is that the actual market price occurs at the equilibrium point—where the demand and supply curves intersect. At this point, the quantity consumers want to buy equals the quantity sellers want to sell, and the price stabilizes.

If the price rises above equilibrium, sellers want to sell more, but buyers want to buy less, leading to excess inventory that pushes prices back down. Conversely, if the price drops below equilibrium, buyers want to buy more, but sellers want to sell less, causing shortages that push prices back up.

In financial markets, these principles still apply. When the economy is doing well, people are confident, and demand for stocks increases. When interest rates are low, investors seek higher returns in the stock market. Factors affecting stock sales include company policies, new listings, or regulations.

Regarding stock price analysis, demand is the buying force, and supply is the selling force. Rising stock prices indicate buying dominance, while falling prices indicate selling dominance. Traders use various tools to gauge this, such as candlestick patterns, trend analysis, or support and resistance levels.

Green candlesticks (closing higher than opening) indicate strong buying pressure. Red candlesticks (closing lower than opening) show strong selling pressure. Doji candles (opening and closing prices close) suggest a balance between buyers and sellers.

Trend analysis is similar: if prices keep making new highs, buying strength remains strong; if they keep making new lows, selling strength remains dominant. If prices move within a range, it indicates a balance of forces.

Support levels are points where buying interest is expected to be strong, so prices tend to bounce upward. Resistance levels are points where selling interest is strong, so prices tend to reverse downward.

A popular technique called Demand Supply Zone uses this principle to time trades. When prices move strongly and then pause within a zone, breaking out of that range signals a trading opportunity.

Sometimes, prices rally and then consolidate (base) before rallying again—this indicates a continuation of an uptrend. Sometimes, prices drop sharply, consolidate, and then continue falling—this indicates a downtrend continuation.

Other times, prices drop sharply, then consolidate, and reverse upward—this signals a trend reversal. Similarly, a sharp rise followed by consolidation and reversal downward also indicates a reversal.

The key is that if we understand demand as the desire to buy and supply as the desire to sell—and recognize that prices are set by the equilibrium of these forces—we can better predict price directions. Learning this isn’t difficult, but it requires time observing and practicing with real data until the picture becomes clear.