Trading Bot Piercing Line and Bearish Engulfing trade signals

This trading bot 

1. needs to function on 1min, 5min, 15min chart

2. code need to be editable

3. once a piercing line signal occurs 1 contract is bought, stoploss is set at the (piercing line low - ATR), TP is set at (piercing line high + 2*ATR), i also need an option to set a trailing stoploss if i choose.

4.  once a bearish engulfing signal occurs 1 contract is sold, stoploss is set at the (bearish engulfing high + 1*ATR), TP is set at ( bearish engulfing low - 2*ATR), i also need an option to set a trailing stoploss if I chose. 

5. I need to be able to set SL and TP ATR multiplicator

6.Ineed to be able to set the number of contracts bought or sold