TA-Lib pattern recognition

[Steven Veenma]

This is my first post on this forum. Let me first say that I like Backtrader very much. I've already tested different strategies and built my own indicators. So please keep up the good work!

I want to test pattern recognition and so I read the documents on the TA-Lib integration. First I tested some other TA-Lib indicators like

self.pattern = bt.indicators.TRIX(self.datas[0])

that worked well. But I can't get the pattern recognition to work. The examples shows:

bt.talib.CDLDOJI(self.data.open, self.data.high,
                             self.data.low, self.data.close)

This returns an error: module 'backtrader.talib' has no attribute 'CDLDOJ.

I tried other variants like

bt.indicators.CDLDOJI(self.datas[0]

but that doesn't work either.

There is a remark on this type of indicators:

Indicators which output a CANDLE (all those looking for a candlestick pattern) deliver a binary output: either 0 or 100. In order to avoid adding a subplot to the chart, there is an automated plotting translation to plot them over the data at the point in time in which the pattern was recognized.

I have used boolean like indicators before so this should not be a problem.

How to get these pattern recognition to work.?