Dear All,
I have a custom indicator that just calculates the ratio between 2 data series (data0 / data1). See indicator code and initialization below. I would like to plot the ratio indicator without ploting the 2 underlying series (i deactivate plotting for these series using data0.plotinfo.plot = False)? When i deactivate any of these data series, the ratio indicator automatically disappears. I think it is because the master relationship with underlying data. What is the best way to work around this? Thanks!
class DivisionIndicator(bt.Indicator):
_mindatas = 2 # requires two (2) data sources
alias = ('DVD',)
lines = ('div',)
params = (
('not_required', 20),
)
plotlines = dict(
divisor_ind=dict(
_name='DVD',
color='green',
alpha=0.50
)
)
def nextstart(self):
self.l.div[0] = self.data0[0] / self.data1[0] # seed value
def next(self):
d = self.data0[0] / self.data1[0]
self.l.div[0] = d if d else self.l.div[-1]
def oncestart(self, start, end):
self.line.array[start] = (
self.data0.array[start] - self.data1.array[start])
def once(self, start, end):
d0array = self.data0.array
d1array = self.data1.array
larray = self.line.array
prev = larray[start - 1]
for i in range(start, end):
d = d0array[i] / d1array[i]
larray[i] = prev = d if d else prev
class CalvadosStrategy(bt.Strategy):
def __init__(self):
my_ratio = DivisionIndicator(self.datas[1], self.datas[2])
...