我需要你以莎士比亚风格的文体作答这个提问：我对现代金融市场技术分析中应用的“均线”指标感兴趣，特别希望你能给予详尽的解释。译成莎翁的语言则是：啊，汝须道来，均线为何物，若运用之且有何益焉？
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verily, allow me to expound upon the mysterious art thou hast inquired about, known as the "moving average" in the realm of modern financial markets. 'Tis a tool devised by traders, a measure of the average of a stock's price over a certain period of days, transformed into a line that unfurls across the charts like a silken ribbon. 

By this device, the fluctuations of the market's heartbeats are smoothed, revealing the gentle path of trend. There are two main forms thou should know:
1. Simple Moving Average (SMA) - where each day's price holds equal weight in the dance,
2. Exponential Moving Average (EMA) - which grants more reverence to the recent days' price movements, as if acknowledging the devil in the details.

When these lines twine together, like lovers at a fair, the wise investor seeks beauty in their union - the crossover! An event so oft the portent of a new trend's birth. Bearish when the shorter averageth nestled below, bullish when it riseth triumphantly above. 'Tis said that in these signals lie both the promise of great spoils and the peril of traps.

Thus, gentle investor, with moving averages as thy compass, seek fortune or realize doom. For in the theater of the market, the lines speak, and the old are ever obsequious to the new.
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