EURUSD traders have been doing their ABCs today: using familiar technical levels to decide where to buy, where to sell, and where to get out if the trade does not work.As the North American session began, I highlighted how the EURUSD had held its 100-day moving average during the European morning. The low reached 1.1567, just above the moving average at 1.15665.For a beginner, a moving average smooths out price changes to help traders judge direction and identify potential support or resistance. The 100-day moving average reflects the average closing price over the last 100 trading days. Today, it acted as support—a level where buyers stepped in and stopped the decline.What does it mean when traders “lean against” that level?They buy near the moving average with a clear exit plan if the price breaks below it. The attraction is that the distance between the entry and the planned exit is small, helping traders define their risk. The dollar amount at risk also depends on the size of the position.Nobody knows whether support will hold. But traders can identify where the reason for buying would no longer apply.Today, that support held, and the price moved higher.The next upside targets were 1.1587, the upper boundary of an area defined by previous price turns, followed by the falling 100-hour moving average near 1.1608.At that second moving average, the same basic lesson played out from the sellers’ side.The 100-hour moving average reflects a shorter period than the 100-day moving average. Today, it acted as resistance—a level where sellers stepped in and stopped the advance. Sellers could lean against that level, with a planned exit if the price broke above it.The price turned lower and is now trading near 1.1584.So buyers had their opportunity at the 100-day moving average, and sellers had their opportunity at the 100-hour moving average. Both sides used a technical level to answer the same question: Where will I know this trade is not working?Those reactions also make the levels more important going forward:Above the 100-hour moving average near 1.1608: A break and sustained move above would favor buyers and open the door for further upside.Below the 100-day moving average near 1.15665: A break and sustained move below would favor sellers and open the door for further downside.Between those levels: Buyers and sellers continue to battle, with support below and resistance above.The lesson is that price action tells a story, and technical tools help traders read it. A rising price shows buyers gaining the upper hand during that move. A falling price shows sellers gaining the upper hand. The technical levels help put those moves into context.For a beginner, think of your trading ABCs this way:A: Assess the bias. Does the price action favor buyers or sellers?B: Be clear about risk. Where would the reason for your trade break down?C: Choose your targets. What is the next level the price needs to reach and get through?That is what EURUSD traders have been doing today. The tools do not guarantee a winning trade. They give you a framework for making decisions, managing risk, and knowing what to watch next.Pay attention to them. This article was written by Greg Michalowski at investinglive.com.