I’m struggling with the Pinescript as below. Instead of calculating the take profit/stop loss level based on the high/low of entry candle, it calculates the level based on the high/low of the next qualify candle. Can someone help me on this. Thank you.

I’m new to TradingView. 
I found a tradingview strategy, but no take profit and stop loss price. I’ve learned that on TradingView, follow FIFO signals. If the first open signal is always open, a new signal will show again, and the previous one is closed.

Create a Trading View custom indicator that automatically identifies the following chart patterns:

I have some small code but I can’t understand, please explain it, thanks:

I would like to use a dynamic comment in Pine Script strategy.exit using a string variable. Does anyone know if this is possible?