When the market is giving the signals for bullish trend, which shows the shorter period exponential(20) moving average crossing the longer period moving average(50), with a strength shown in the market i.e. RSI greater than 40.
So when all these conditions are met a buy signal is generated in output (Output of Ema cross and Rsi) having value as 1. So a trader can enter into a long position when the value is 1 and exits a stock when value is 0.
This script is not to be used for selling the stocks in downtrend