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Support and resistance are core concepts of trading that mark on the zones where substantial buying and selling pressure is likely to occur in terms of notable price action. As not all the zones have the same underlying pressure, it is crucial to identify the most relevant, which means detecting key levels.
Those key levels are the ones that will offer the more reliable signals of forthcoming movements, whether breakouts for continuations or reversals.

Crypto assets, like any other securities, are affected by the forces of supply and demand. Buyers and sellers tend to accumulate on specific prices, forming key levels and establishing a price action history over the market structure.
These key levels are typically held over time, establishing a pattern where the price is expected to react significantly. Essentially, these levels represent a psychological barrier that influences the behavior of the rest of the traders.
Generally, support represents a level of substantial demand, an attractive price where traders are willing to make buying positions. On the other hand, resistance means a level of marked supply, an attractive price where traders are inclined to make selling positions.
In most cases, support and resistance prices tend to be round numbers, making them easier to identify, and being the most relevant for price action.
Support and resistance can appear in several market conditions and patterns. They shape the market structure and temporary movements like trends and ranges, or patterns like head and shoulders and triangles.
In the context of crypto markets, support and resistance can be broken easily due to the intrinsic dynamics of these markets where liquidations and overleveraging are very common situations generating volatility.
The support in trading is a level that is below the current price, where there are enough buyers, which means demand, to stop the price, and this does not continue to fall.
We can imagine it as a floor against which the price hits when it is falling. But occasionally, the support will not retain the price, and it will continue to decline. In that case, there was not enough demand at that price level.
Resistance is the opposite of support. It is a level at which there are many sellers, which means supply, who make the price stop and not continue rising. We can imagine it as a ceiling that makes the price slow down.
The logic behind the resistance is that as the price increases, buyers are less encouraged to buy and sellers increase. At a certain level, the sellers are greater than the buyers and the price will fall.
We must not forget that sometimes the resistance will not hold, and the price will continue to rise.

In the market structure traders can find various forms of support and resistance, but not all of them represent a relevant area of future price action. Key levels are the areas where major supply and demand will be present, identifying them will guarantee the best entries.
These are horizontal lines marked across the market structure where the price has reacted multiple times in the chart.
In these levels, the price attempts to move above a level but gets pushed back down when there is strong resistance or moves to go below a level but finds support.
Round numbers like 100, 20, and 500, etc, can periodically act as strong psychological support or resistance.

These are dynamic lines joining highs in downtrends or lows in uptrends to identify the prevailing trend direction. Two scenarios can emerge from the price action near these lines:
Fibonacci is a sequence, a series of numbers with specific ratios.
Fibonacci retracement levels indicate likely zones where the price might retrace, or pullback, before continuing the trend.
Fibonacci extensions are used to forecast possible price targets following a breakout.
Moving averages are charting indicators that smooth out price movements and create dynamic lines on the chart.
The price usually encounters support or resistance near the moving average line, especially key moving averages like the 50-day or 200-day. The longer the period, the more weight it adds to the price level analysis.
Chart patterns are key formations in the chart that represent a certain behavior behind a movement.
Some patterns like head and shoulders have key support levels, in this case over the neckline.
Others suggest key resistance levels, like the double-top pattern.
These are specific chart patterns recognized by technical analysts and can indicate potential reversal zones.

Support and resistance levels are easy but fundamental concepts for any trader who aims to leverage on zones of most relevant price action. They constitute one of the key parts of understanding technical analysis. Many of these areas can be detected on the chart by drawing a horizontal line or a trendline.
If you want to trade support and resistance in the crypto market with all the necessary tools, in Altrady you can sign up for a free trial account with paper trading to test your strategy based on key levels.