This is my simple way to quickly see MACD signals without having the MACD taking up space. The one at the bottom is for display to show how this works. A crossover occurs when the arrow flips over. The position of the arrow tells you if it is currently above or below the zero line. You can change the script to overlay and have it show up above or below price...
moving average crossover with added functions:
if you want crossover with price set ma1 length to 1, or use as dual ma with both lengths, ability to turn ma's on and off leaving the crossover signals behind, ability to chose ma mode (sma, ema, rma, wma, vwma, swma and alma), ability to chose source (open, high, low, close, hl2, hlc3 or ohlc4).