Flat-panel liquid-crystal-display monitors are a marker that can give people a sense of the market's health, Jim Cramer said on his "RealMoney" radio show Friday. 3M ( MMM) recently announced that because of an overestimated demand for LCD TVs because of heightened viewing anticipation of the World Cup soccer tournament, the company's results would not reach expectations. When this bad news came out, other stocks in the sector were impacted immediately. The news also means Best Buy ( BBY) and Circuit City ( CC) might get hurt as well, since they sell these TVs, Cramer said. In addition, Advanced Micro Devices ( AMD) also fell, he said. Meanwhile, the employment number, which was announced this morning, said that a little more than 100,000 jobs were created last month, a smaller number than what was expected. People believe it's because construction for houses is down, Cramer said, adding that people are concerned with one thing: whether interest rates will continue to go up or not. There is a lesson here: If the Fed pauses, bulls will come, he said. To see the most recent edition of The RealMoney Radio Recap in its entirety, please click here. This recap is published every day around 3 p.m. ET.