Build an indicator, scanner and strategy using Pine Script

Building a custom indicator using Pine Script for Tradingview: Parameters Indicator, scanner and strategy No of Time frame to be used : 6 Buy condition If meet all the condition at all the timeframe (true) 1 Price close is higher than EMA (X1,X2) 2 Positive crossover 3 MACD is higher than 0 line 4 MACD Histograme is higher than 0 5 RSI EMA (X1) is higher than RSI EMA (X2) 6 RSI is higher than ( Max of (RSI EMA (X1,X2)) Exit condtition for Buy If any of the condition is false Imp. Point Exit Buy position should apper only when if indicator has generated Buy signal previously Sell condition If meet all the condition at all the timeframe 1 Price close is lower than EMA (X1,X2) 2 Negative crossover 3 MACD is lower than 0 line 4 MACD Histograme is lower than 0 5 RSI EMA (X1) is Lower than RSI EMA (X2) 6 RSI is lower than ( Min of (RSI EMA (X1,X2)) Exit condtition for Buy If any of the condition is false Imp. Point Exit Sell position should apper only when if indicator has generated Sell signal previously Other points for indicator All the condition should be with checkbox of enable/disable Near signal ticker value should appear one comment box should provided in indicator It should be able to generate alerts.