P&L chart: Size meaning

[jjviton]

Hi all,
I´m quite new using this tool, I would like to understand the meaning of Size paramater. I use basic buy order, so I asume I expend all my money at any order.

thanks in advanced

[kernc]

Have you found size= described in the docs?

[jjviton]

ahhhhh
It is the number of stocks bought. SIZE = ActualCAsh/UnitStockPrice

[jjviton]

then, what do you represent with triangle size? it is not linked to trade size

[kernc]

Indeed, plot triangle size is proportional to trade size:

backtesting.py/backtesting/_plotting.py

Lines 400 to 411 in 0ce24d8

	def _plot_pl_section():
	"""Profit/Loss markers section"""
	fig = new_indicator_figure(y_axis_label="Profit / Loss")
	fig.add_layout(Span(location=0, dimension='width', line_color='#666666',
	line_dash='dashed', line_width=1))
	returns_long = np.where(trades['Size'] > 0, trades['ReturnPct'], np.nan)
	returns_short = np.where(trades['Size'] < 0, trades['ReturnPct'], np.nan)
	size = trades['Size'].abs()
	size = np.interp(size, (size.min(), size.max()), (8, 20))
	trade_source.add(returns_long, 'returns_long')
	trade_source.add(returns_short, 'returns_short')
	trade_source.add(size, 'marker_size')

[jjviton]

thanks Kernc for the explanation.

Thank you also for the great job