Price crossover happens when the value crosses below or higher than a Moving average to signifies a likely trend change. An intraday trading strategy includes Moving average too.
A golden cross is a buy signal because of the trend shifting up. we see it from a chart of 2 moving averages, once the shorter one crosses over the long run.
A dead cross is found from a similar chart when the shorter Moving Average crosses below the long run one, signaling a downtrend.
It is vital to notice that the moving average is calculated on historical information and the results can be unsystematic at times.