Buy and Sell Indicator

This indicaor is draw time(ex 09:15 nifty 50) high and low of candle ..

for buy condition -

1) when price is crossing time candle high open a long trade
2) check for condition is this trade open less thn previous trade

if both condition are true thn open a buy trade

for sell condition -

1) when price is crossing time candle low open a short trade
2) check for condition is this trade open grater thn previous trade

if both condition are true thn open a sell trade

to build logic of 2nd condition fikira help me thnx mate ...