关于Moving Average指标

在VT里面的这些指标：
Moving Average
Moving Average Convergence/Divergence (MACD)
Moving Average Convergence/Divergence (MACD) - Histogram
Moving Average Convergence/Divergence (MACD) - Line
Moving Average Envelope
Moving Average of RSI
Moving Slope Rate of Change
有什么区别啊，麻烦解释一下。谢谢了！