
Support and resistance levels are one of the most common concepts in trading. Oddly enough, there are plenty of exercises how to build these levels.
At first, let's look at the basics.
Look at the diagram above. As can be seen this zigzag moves up (bull market). When the market moves up and then pulls back, the highest point reached before the rollback becomes the resistance.
As the market continues to move up, the lowest point reached before the reversal becomes a support level. Thus the support and resistance levels are being formed during the movement of the market and its kickbacks. All of the above mentioned is true for downward movement, but in mirror image.