How to plot long and short positions like the ones using the drawing tool, from pinescript?

Question

I'm trying to draw long and short positions like the ones on the image automatically using pinescript.

Answer 1

With strategy.position_size you can create a rule with your colors
Something like that:

// tpLvl = Your Take Profit level
// slLvl = Your Stop Loss level
p_tpLvl      = plot(
  strategy.position_size != 0 ? tpLvl : na,
  title      = 'Take Profit',
  color      = strategy.position_size != 0 and 
               strategy.position_size == strategy.position_size[1] ?
               color.new(color.green, 0) : na,
  linewidth  = 1,
  style      = plot.style_linebr)
p_slLvl      = plot(
  strategy.position_size != 0 ? slLvl : na,
  title      = 'Stop Loss',
  color      = strategy.position_size != 0 and 
               strategy.position_size == strategy.position_size[1] ?
               color.new(color.red,   0) : na,
  linewidth  = 1,
  style      = plot.style_linebr)
p_entryLvl   = plot(
  strategy.position_size != 0 ? strategy.opentrades.entry_price : na,
  title      = 'Entry Price',
  color      = strategy.position_size != 0 and 
               strategy.position_size == strategy.position_size[1] ?
               color.new(color.white, 0) : na,
  linewidth  = 1,
  style      = plot.style_linebr)
fill(
  p_entryLvl, p_tpLvl,
  color      = strategy.position_size != 0 and 
               strategy.position_size == strategy.position_size[1] ?
               color.new(color.green, 80) : na,
  title      = 'Take Profit Area')
fill(
  p_entryLvl, p_slLvl,
  color      = strategy.position_size != 0 and 
               strategy.position_size == strategy.position_size[1] ?
               color.new(color.red,   80) : na,
  title      = 'Stop Loss Area')