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=== Magnets (support and resistance) ===
The final pattern in my 10 best price action trading patterns is more of a concept than a setup. The market is always testing as it tries to establish a price range. It usually cannot tell if it has gone far enough up or down until it goes too far.

Support is any price below the market where buyers might come in, as either bulls buy to create new longs or bears buy to take profits. Resistance is any price above the market where bulls might take profits on longs and bears might short.

Common magnets include the tops and bottoms of trading ranges, prior highs and lows, trend lines, channels, measured move projections, and moving averages. Computers control the market, and all support and resistance is based on things that computer programs can calculate. The result is that the market often accelerates near the target once a substantial number of algorithms believe that the target will be reached.
[[文件:10PA Fig21.png|无|缩略图|800x800像素|When a market breaks above a prior high, it often pulls back to test that breakout point. Bulls will buy a reversal up.]]
[[文件:10PA Fig22.png|无|缩略图|800x800像素|A trading range day often oscillates around the open all day. If the market is near the high or low of the day in the final 2 hours, look for a reversal toward the open. Most trading range days end the day around the open.]]
[[文件:10PA Fig23.png|无|缩略图|800x800像素|Beginner gets upset by strong rally suddenly becoming endless bear trend.]]
[[文件:10PA Fig24.png|无|缩略图|800x800像素|Experienced trader knows where resistance is and looks for a reversal down. Any strong rally to resistance can simply be a buy vacuum test of the resistance.]]