Resistance:
Resistance is a level that doesn’t let the price go higher.
Like the support level, the resistance level can be broken up and then act as a support.
Look at the resistance level (the red line) in the below chart.

And see how this resistance became broken up and then was retested as a support line:

It is time to tell you that finding support and resistance levels is the foundation of technical analysis. Everything that we do in technical analysis is based on the support and resistance levels we find on the charts. Even patterns like triangles, wedges, pennants, double and triple tops and bottoms, head and shoulders and … are created by support and resistance levels.
Some important questions:
- Why do we have support and resistance levels in the market?
- Why do the price goes up as soon as it touches a support level and goes down as soon as it touches a resistance level?
- What causes a support or resistance level becomes broken?
These are the questions that could be formed in your mind. It doesn’t make any difference in your trades if you know the answer of these questions or not. You just need to know what a support/resistance level is and how it acts. But it is always useful to know more than the basic.
You can be a good driver even if you know nothing about the engine and gearbox but professional drivers have to know about engine, gearbox and all other parts of the car. That’s why they are called professional drivers. You can be an ordinary trader or a professional trader. professional traders know a lot about the psychology of the market.
So why do we have support levels in the market?
We have support and resistance levels in everything. For example in the weather changes. It becomes hot in summer but it has a limit in different regions. It doesn’t go up as much as it can. There is a resistance level in different areas. Every year the temperature goes up, retests the resistance and then goes down. It is the same in Winter. The temperature goes down but it doesn’t go lower than a special level in different regions (support).
What prevents the temperature from going above or below a special level? There are different factors like atmosphere and geographical conditions.
It is the same as the forex market and all other kinds of markets.
Traders buy and buy and buy and the price goes higher and higher and higher but can the trader keep on buy for good? Or will they find a seller to sell his/her shares to them anytime that they want to buy?
Definitely not because they have limitations. They can not afford to buy more than a special limit and when most of the buyers reach their limit, they stop buying and start selling gradually and so the price will be stopped from going up and starts going down gradually. Then the other buyers who had kept their positions, becomes realized that the price will not go higher and will go down. So they sell and the price goes down much faster.
On the other hand, when you want to buy, a seller should be found at the other side of the market. Otherwise you can not buy. And it is clear that you can not find a seller at any condition and time and visa versa.
This cycle will be repeated over and over but each time when the buyers reach their limit level, they stop buying. When we have an uptrend - like the EUR-USD chart you see above - each limit will be higher than the previous one because the buyers become stronger and their buying limit goes higher because they have made profit in their previous trades. So we still have a limit level but this level is higher than the previous level.
When you connect the buying limits (tops) to each other, you will have a resistance level: