General Discussion

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  Multi-currency portfolio with Futures markets
  • bill

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  I settled on: Adding a step to the broker's next method that will update each comminfo (possibly one for each data feed) with the new respective FX rate Update the methods of a new commission class that extends CommissionInfo as per the original suggestion. My first post was just confused. With the 2 changes here, the commission info objects have the current rate and apply it to the calculations, and only one minimal change is needed to the broker, and no changes to Trade or other classes are needed.
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  target order with different price limit depends on buy or sell
  target order • • Yi Fang

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  incorrect 2 hour resampling
  • dzz007

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  Every trading day is composed of thirteen 30 min periods. Each single trading day is also broken up into four 2 hour periods. Each trading day has 6.5 hours in it. 6.5 is not evenly divisible by 2 hours. This means that one of the four 2 hour periods will be using data that is actually 30 mins long. Backtrader makes the 2 hours period that is composed of 30 mins worth of data as the first 2 hour period of the day (this is the first 30 minutes of the trading day). When trying to compare a strategy that was created using a different platform, like tradingview.com, the 2 hour period data is inconsistent. Tradingview.com, as well as real time data for live trade execution, uses the last 2 hour period/candle stick of the day as the 2 hour candle stick that is composed of 30 min data (because remember, 6.5 is not evenly divisible by 2 so this last candle stick of the day would equal the .5 remainder), as opposed to backtrader which uses the first 30 mins of the data from the day to print (the .5 remainder) 2 hour candle stick. In backtrader, is there any way I can change the 2 hour period that is using 30 mins worth of data(the .5 remainder) to the last 2 hour period of the trading day instead of it being the first 2 hour period/candle stick of the trading day?
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  Computing pnl for sub-periods
  • CremaKing

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  strat[0].broker.logical_trade_counts. You may want to enlighten us and let us know where that comes from. There isn't such a thing. Ahh, good point. It is a variable I'm keeping track of in the strategy to count the number of times I put on or take off a hedged position. Analyzers? Docs - Analyzers Docs - Analyzers Reference Thank you. bt.analyzers.PositionsValue seems to give me what I need when I add cash=True.
• A

  Cheat on order execution price
  • Aris L

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  @cerberos I was also looking for such a system I tried your way but I think in my tests it just sells and buys the asset at same open price itself. Because of this its doing nothing to the overall trade. If we add commision then we lose the trade. cerebro = bt.Cerebro(cheat_on_open=True) def next(self): #order to sell at close price self.order = self.sell(coo=False, coc=True,price=self.data.close[0]) def next_open(self): # order to buy at open price self.order=self.buy(coo=True, coc=False,price=self.data.open[0])
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  Tracking an Index with equal weight positions
  • Nicola Prada

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  Dividends and interest for short positions
  • Nicola Prada

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  Leverage API question/suggestion
  • scottz1

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  One is telling you the leverage that will be applied to an asset when acquiring it. The other is telling you the actual leverage of your account, which is obviously 1 if nothing has been bought. It's in the topic you link to: @backtrader said in get_leverage() calls: @ThatBlokeDave said in get_leverage() calls: However, self.broker.get_leverage() appears to be doing a different calculation It's not a different calculation. It's different altogether. Invoking that method, which is intended for user consumption unlike the one above, reports the actual leverage level in the market.
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  I introduce myself. I am French. My name is Pierre Rougier and I am interested in Backtrader since today.
  • Pierre8r

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  Hi everybody, I'm french and I'm living close to Paris. I developped strategies since 2010. You can contact me to tb@groupebourdin.com to talk about that.
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  Volume plot of PandasData uses the whole DataFrame as legend label
  plot • • Kristofer Monisit

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  I tried it again with a pristine installation of backtrader (pip install backtrader). With the defaults, it's OK, but with voloverlay=False, the entire DataFrame is printed.
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  bt for low-frequency / trend following trading
  • artur.space

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  @backtrader said in bt for low-frequency / trend following trading: You don't have any other approach if you want to operate before the close. You need to have the price updated before you operate. Ok, and how can I get it? Alpaca live account isn't allowed for me. What API with paper-trading abilities should I use ?
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  How to remove frame around the plot in Jupyter Notebook
  • Kristofer Monisit

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  I don't know what your intent was ... but a pull-request which mainly consist of your personal preferences, like voloverlay=False ist not a pull-request.
• C

  Anyone use backtrader to do live trading on Bitcoin exchange?
  crypto pairs trading • • CptanPanic

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  @theroque said in Anyone use backtrader to do live trading on Bitcoin exchange?: Hi guys. I am using this CCXTbt library, and to be honnest, it's kinda hard getting it to work properly. I have a simple question: How ot have a fetch_ohlcv function work on an optimised time frame ? The thing is, I see this function running all the time, spamming the exchange with no reason. I think that instead, it should be called at a fixed time, like every minute, or every granularity, more generally speaking. I am perfectly aware of the rateLimit parameter on the exchange, but I don't want to set a timeout between my API calls: I don't want any timeout between the time I fetch a ticker, and place an order, because a small wait can result in losing a bid or a sell. Try this thread: https://community.backtrader.com/topic/401/optimizing-with-ibstore-causes-redundant-connections-downloads/5 A similar thing happens with IB on optimization. BT has the best answer at the end.
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  Broker Value , what does this mean?
  • greg nwosu

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  Your cash goes down to your broker value.
• P

  Multiple strategy execution
  • param.jeet

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  It seems you have missed the meaning of the answer above. A single account broker means that any action on an asset, regardless of the origin strategy will affect what the other strategies are doing From a logical point of view strategies are run in parallel. The implementation executes them sequentially because Python doesn't have parallel thread execution (the thread model is valid for I/O bound threads but not for CPU bound threads which is the case here) What you want is clear, but it's not there.
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  Example of usage with Bitcoin in Binance
  • Rodrigo Brito

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  Hi @diamonddogs95, I used https://github.com/xFFFFF/Gekko-Datasets to generate a database in SQLite. Then I open it and run this query https://github.com/rodrigo-brito/backtrader-binance-bot/blob/master/dataset/queries.sql
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  Multiple Strategies with Backtrader and Pyfolio
  • Sushil Dubey

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  pyfolio support is actually deprecated due to the ever changing API. It's something you will have to tackle yourself.
• K

  Thanks Backtrader!
  • kicking_potato88

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  It's a great framework, the live trading support is extremely useful to me
• 

  unit tests for backtrader library
  • Xerxys

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  Customization on Buy Sell Bokeh Graph
  • Sushil Dubey

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