Hello,
I'm trying to unit test my strategy, but I'm finding it hard to obtain an instantiated object for my Strategy class,
these classes are supposed to be instantiated directly by Cerebro, so if I try instantiating them directly I get:
*** AttributeError: 'NoneType' object has no attribute '_next_stid'
on the other side, cerebro seems to hold only an uninstantiated version of the class, how could I get an instantiated Strategy Object so that I could unit test its methods?
Thanks,
Hello,
Because TWS sometimes disconnects and sometimes requires re-login, I need to include an occasional restart of my trading system and TWS dockers.
Because my TS is based on limit orders (and not market orders) when I restart there might be orders still pending from a previous session, I would need to extract from interactive brokers the info about the existing pending orders, so that I can manipulate them (i.e. cancel them)
I'm struggling to get this info, I've explored:
self.broker.orders which don't seem to be available for an IBBroker,
self.broker.ib which has lots of info, but don't seem to see anything order related
how could I get this info?
Thanks,
Giulio
found my issue:
A StopLimit order requires the plimit parameter, to specify at which price to activate the limit order, somehow I managed to get through backtesting without setting it, but interactive broker didn't like it.
apologies for the noise.
Apologies for the late response, somehow I ran out of free time for this project, and was busy with something else.
@backtrader said in TypeError: error() takes 2 positional arguments but 4 were given:
You could let us know that exectype=4 is StopLimit which differs from the standard Limit which is shown by Interactive Brokers for bracket oerder.
exectype=4 is the result of exectype=bt.Order.StopLimit, I got that value by copy pasting the params for the method call.
You could then look at this, which means the order wasn't sent and Interactive Brokers is probably giving you a huge warning and the TWS console is showing something, including orders which may have been created but not sent.
Since you try again, TWS interprets you are ok with the huge ignored warning.
I checked on TWS log, it complains about number format,
2019-03-15 17:00:59.175 [HR] ERROR [JTS-EServerSocket-372] - [35:62:76:1:0:0:0:ERR] Client socket broken -
java.lang.NumberFormatException: For input string: "1.132"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:580)
at java.lang.Integer.parseInt(Integer.java:615)
at jextend.bb.p(bb.java:908)
at jextend.dI.aZ(dI.java:2517)
at jextend.dI.run(dI.java:2114)
at java.lang.Thread.run(Thread.java:748)
obviously my entry price (1.132) is not an Int, I'm not sure how should I represent my entry price as an int.
Hello,
I'm switching my strategy to paper trading on interactivebrokers, the strangest thing is happening, this is my error as logged:
--------------------
---> pavement.run
Traceback (most recent call last):
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/ib/ext/EClientSocket.py", line 958, in placeOrder
self.send(order.m_tif)
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/ib/lib/overloading.py", line 82, in __call__
return func(*args)
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/ib/ext/EClientSocket.py", line 1754, in send_1
self.m_dos.write(val)
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/ib/lib/__init__.py", line 152, in write
send(pack('!c', char))
BrokenPipeError: [Errno 32] Broken pipe
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/paver/tasks.py", line 201, in _run_task
return do_task()
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/paver/tasks.py", line 198, in do_task
return func(**kw)
File "pavement.py", line 133, in run
raise SystemExit(main([CODE_DIRECTORY] + args))
File "/Users/me/Documents/me/trading/trader/trader/main.py", line 79, in main
raise error
File "/Users/me/Documents/me/trading/trader/trader/main.py", line 76, in main
action(options)
File "/Users/me/Documents/me/trading/trader/trader/main.py", line 40, in _live
live.run()
File "/Users/me/Documents/me/trading/trader/trader/live.py", line 59, in run
self.stats = self.cerebro.run()
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/backtrader/cerebro.py", line 1127, in run
runstrat = self.runstrategies(iterstrat)
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/backtrader/cerebro.py", line 1298, in runstrategies
self._runnext(runstrats)
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/backtrader/cerebro.py", line 1630, in _runnext
strat._next()
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/backtrader/strategy.py", line 347, in _next
super(Strategy, self)._next()
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/backtrader/lineiterator.py", line 271, in _next
self.next()
File "/Users/me/Documents/me/trading/trader/trader/strategies/BankTradingStrategy.py", line 190, in next
self.short_trade = self.place_short()
File "/Users/me/Documents/me/trading/trader/trader/strategies/BankTradingStrategy.py", line 115, in place_short
limitprice=price - limitdistance)
File "/Users/me/Documents/me/trading/trader/trader/SupportStrategy.py", line 43, in sell_bracket
orders = super(SupportStrategy, self).sell_bracket(**kargs)
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/backtrader/strategy.py", line 1217, in sell_bracket
o = self.sell(**kargs)
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/backtrader/strategy.py", line 969, in sell
**kwargs)
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/backtrader/brokers/ibbroker.py", line 391, in sell
return self.submit(order)
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/backtrader/brokers/ibbroker.py", line 337, in submit
self.ib.placeOrder(order.m_orderId, order.data.tradecontract, order)
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/backtrader/stores/ibstore.py", line 1286, in placeOrder
self.conn.placeOrder(orderid, contract, order)
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/ib/lib/__init__.py", line 60, in inner
return func(*args, **kwds)
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/ib/ext/EClientSocket.py", line 1155, in placeOrder
self.error_0(id, EClientErrors.FAIL_SEND_ORDER, str(e))
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/ib/lib/__init__.py", line 60, in inner
return func(*args, **kwds)
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/ib/ext/EClientSocket.py", line 1709, in error_0
self.m_anyWrapper.error(id, errorCode, errorMsg)
File "/Users/me/Documents/me/trading/trader/trader_venv/lib/python3.7/site-packages/ib/lib/overloading.py", line 82, in __call__
return func(*args)
TypeError: error() takes 2 positional arguments but 4 were given
I can reproduce this with:
(Pdb) self.sell_bracket(price= 1.1350936200039081, exectype= 4, stopprice= 1.1373796835411358, limitprice= 1.1298980210556635)
*** TypeError: error() takes 2 positional arguments but 4 were given
(Pdb) self.sell_bracket(price= 1.1350936200039081, exectype= 4, stopprice= 1.1373796835411358, limitprice= 1.1298980210556635)
[<backtrader.brokers.ibbroker.IBOrder object at 0x12b0b9668>, <backtrader.brokers.ibbroker.IBOrder object at 0x12b0b9908>, <backtrader.brokers.ibbroker.IBOrder object at 0x12b0b9ac8>]
(Pdb)
basically sell_bracket fails only at the first call. the following ones see no problems
any ideas?
Hello,
When plotting the results of a backtest the broker cash and value in the top portion are on the same scale. like in the screenshot
With forex broker cash varies on a way greater scale than the value, so the value is usually shown as a semi flat line, making it difficult to appreciate its variations, I think it would be nice to have the two lines on separate scales, so that both can be appreciated visually.
What do you think?
@backtrader thanks for the link,
this:
- Issue a Market order
- Upon confirmation of execution you have the actual execution price and the actual market price (close)
- You can then issue two OCO orders which will bracket your existing positions. You calculate the stop-loss and take-profit prices from the execution price or from the market price
this was actually my initial implementation, I'm trying to move away from it because while it would work fine with real time trading, it introduces a bias in backtesting.
I explain: I understand that, in backtesting, events happen only at the end of full candles, it might happen that the bracket orders would have been executed in the same candle of the entry,
but obviously won't, because in backtrading they will be submitted only at the end of the candle.
maybe I could work it around (actually just diminish the bias) by backtesting with minute candles and resampling it to hour?
@backtrader said in problem with bracket orders:
I would even ask myself if a StopLimit order for the mainside is possible in a real broker, because that order type is in many occasions simulated.
fair point, stoplimit might be simulated, but for all intents I don't think it would make a massive difference in strategies that use it, as long as one knows what's going on.
Though I get the same issue if I change to use simple stop orders, rather than stoplimit:
self.long_trade = self.buy_bracket(
price=entry_long,
exectype=bt.Order.Stop,
stopprice=stop_long,
limitprice=limit_long
)
self.short_trade = self.sell_bracket(
price=entry_short,
exectype=bt.Order.Stop,
stopprice=stop_short,
limitprice=limit_short,
oco=self.long_trade[0]
)
It doesn't look like the issue comes from the execution type.
hello,
thanks for your reply,
I don't understand what you mean: do you reckon that it wouldn't be possible to place two orders like these with a broker?
basically this structure:
Hello,
I found something that I don't understand on how bracket orders work, I'll explain:
my strategy tries to catch runaways using the bollinger bands, so what I do is to place:
two stoplimit bracket orders: buy above current price, and a sell below current price,
These should open respectively a long and short position.
They are also OCO, so that if a long is open then the short will not, and vice versa.
This is my code to place such orders:
self.long_trade = self.buy_bracket(
price=entry_long,
exectype=bt.Order.StopLimit,
plimit=entry_long,
stopprice=stop_long,
limitprice=limit_long
)
self.short_trade = self.sell_bracket(
price=entry_short,
exectype=bt.Order.StopLimit,
plimit=entry_short,
stopprice=stop_short,
limitprice=limit_short,
oco=self.long_trade[0]
)
With this I expect that both stoplimit orders get accepted, if price allows one of them to be opened (say the long/buy one), the other order (the short/sell and its respective bracked orders ) gets canceled, at the same time the two bracket orders (at stopprice and limitprice) become active.
With these orders my strategy can open as many long positions as it wants and everything works as expected. As soon as the price hits a short/sell order, something weird happens, here's my logs to show it:
ORDER 151, main status: Accepted - Buy, price: 1.04395
ORDER 152, (parent 151) stop status: Accepted - Sell, price: 1.03978
ORDER 153, (parent 151) limit status: Accepted - Sell, price: 1.04645
ORDER 154, main status: Accepted - Sell, price: 1.03895
ORDER 155, (parent 154) stop status: Accepted - Buy, price: 1.04312
ORDER 156, (parent 154) limit status: Accepted - Buy, price: 1.03645
ORDER 154, main status: Completed - Sell, price: 1.03895 actual price: 1.03895
ORDER 151, main status: Canceled - Buy, price: 1.04395
ORDER 156, (parent 154) limit status: Canceled - Buy, price: 1.03645
ORDER 155, (parent 154) stop status: Canceled - Buy, price: 1.04312
[151, 152, 153] are respectively the main, stop, limit orders for the buy_bracket,[154, 155, 156] are respectively the main, stop, limit orders for the sell_bracket,154 is completed, so the main buy order is canceled as expected,[152, 153] should be canceled too but they are not.[155, 156] should NOT be canceled, but they arethis leaves my strategy with an open position (which prevents from creating further orders) that has no orders to close it, effectively hanging the whole strategy.
I tried reverting the order creation in the code, first creating the short_trade, and lastly creating the long_trade:
self.short_trade = self.sell_bracket(
price=self.sma - distance,
exectype=bt.Order.StopLimit,
plimit=self.sma - distance,
stopprice=self.sma + stopdistance,
limitprice=self.sma - limitdistance)
self.long_trade = self.buy_bracket(
price=self.sma + distance,
exectype=bt.Order.StopLimit,
plimit=self.sma + distance,
stopprice=self.sma - stopdistance,
limitprice=self.sma + limitdistance,
oco=self.short_trade[0])
and exactly the reverse happens, I can open and close short trades no problems, but as the first long/buy trade is opened its bracket orders are canceled and the whole strategy stops working.
I'm not sure what I'm doing wrong here, any ideas?