Trend determination is obviously important for trend followers, but anyone trading in any style should be aware of the trend in the market they are trading. The overall trend can influence your trading style. If the trend is up, you probably will have a different way you treat buy signals from counter trend sell signals. If the trend is sideways, then applying a trend following method would be frustrating and probably not profitable. A downtrend in certain markets can have a different character than an uptrend. Beginnings of trends can be easier to trade than end of trends, in many cases. Therefore, it is important to know what the trend is.
But to complicate matters, there can be many trends at play in the same market, even on the same chart. There are trends within trends. Different period lengths on moving averages, or indicator inputs, can signal a different, often confusing and conflicting trend. There can be a counter trend down move on a 30-minute chart, while the daily chart is showing a powerful uptrend, while the monthly chart is showing a sideways trend. When they all line up, it is the most comfortable and reassuring time to take a trade, but if you wait for everything to be in synch you would probably trade very little, and often not in a timely manner. And often the comfortable and easy trade is the one everyone sees, and it often turns out to be untimely. It is best to keep it simple and just trade off the time frame of the chart you are analyzing.
But to complicate matters, there can be many trends at play in the same market, even on the same chart. There are trends within trends. Different period lengths on moving averages, or indicator inputs, can signal a different, often confusing and conflicting trend. There can be a counter trend down move on a 30-minute chart, while the daily chart is showing a powerful uptrend, while the monthly chart is showing a sideways trend. When they all line up, it is the most comfortable and reassuring time to take a trade, but if you wait for everything to be in synch you would probably trade very little, and often not in a timely manner. And often the comfortable and easy trade is the one everyone sees, and it often turns out to be untimely. It is best to keep it simple and just trade off the time frame of the chart you are analyzing.
Most of us want indicators to guide us, as indicators are quantifiable. We can lean on them with more confidence. However, the purest and fastest way to determine trend is just through studying the price structure. Price does not lag. Price is not derived from anything. It is current. It might frustrate, but it doesn't lie.
The easiest way to define a trend using price structure is by observing high and low swing points. Swing points, or pivot points, are price bars that have a high point surrounded by two or three lower highs on either side, or a low price bar surrounded by two or three higher lows on either side.
However you define the swing point, the idea is to have a series of prices that keep taking out the previous swing point in one direction. This is the same theory of a market making higher highs and higher lows, although this isn't always exactly true. Sometimes a pause will form in the price structure and prices temporarily go opposite to the trend, with the market making a lower high, but as long as a lower low is not taken out the uptrend is still intact.
These swing points are important to the price structure because they mark where prices stopped and reversed, at least momentarily. The market can then re-test these areas to see if price gets turned back again, or if price can overcome the previous resistance point and move beyond. The market is constantly testing whether trade is accepting or rejecting price and these swing points are the reference points for these tests.