延长佣金
佣金和关联功能由单个类 CommissionInfo 管理,该类 CommissionInfo 主要由调用 broker.setcommission 进行实例化。
有一些帖子讨论了这种行为。
- 
佣金:股票与期货 
- 
提高佣金:股票与期货 
这一概念仅限于有保证金和每份合同固定佣金的期货和基于价格/规模百分比佣金的股票。即使达到了目的,也不是最灵活的计划。
关于我自己的实现,我唯一不喜欢的是CommissionInfo采用绝对值(0.xx%)而不是相对值(xx%)
对 GitHub29的增强请求导致了一些返工,以便:
- 
保持 CommissionInfo和broker.setcommission与原始行为兼容
- 
对代码进行一些清理 
- 
使佣金计划灵活,以支持增强请求和进一步的可能性 
到达样品前的实际工作:
class CommInfoBase(with_metaclass(MetaParams)):
    COMM_PERC, COMM_FIXED = range(2)
    params = (
        ('commission', 0.0), ('mult', 1.0), ('margin', None),
        ('commtype', None),
        ('stocklike', False),
        ('percabs', False),
    ) 
引入了CommissionInfo的基类,该基类为混合添加了新参数:
- 
commtype(默认为无)这是兼容性的关键。如果值为 None,则CommissionInfo对象和broker.setcommission的行为将与之前一样工作。即:- 
如果设置了 margin,则佣金方案适用于每个合同都有固定佣金的期货
- 
如果未设置 margin,则佣金方案针对股票,采用百分比法
 如果该值为 COMM_PERC或COMM_FIXED(或任何其他派生类),这显然决定了佣金是固定的还是基于百分比的
- 
- 
stocklike(默认为 False)如上所述,旧的 CommissionInfo对象中的实际行为由参数margin确定如上所述,如果 commtype设置为None以外的其他值,则该值表示该资产是否为期货类资产(将使用保证金并执行基于条形图的现金调整 9,否则为股票类资产)
- 
percabs(默认为 False)如果 False,则百分比必须以相对值(xx%)通过如果 True百分比必须作为绝对值传递(0.xx)CommissionInfo是CommInfoBase的子类,将该参数的默认值更改为True以保持兼容行为
所有这些参数也可以在broker.setcommission中使用,现在看起来如下:
def setcommission(self,
                  commission=0.0, margin=None, mult=1.0,
                  commtype=None, percabs=True, stocklike=False,
                  name=None): 
请注意以下事项:
- percabs是- True保持行为与- CommissionInfo对象的上述旧调用兼容
要测试的旧样本commissions-schemes已经过修改,以支持命令行参数和新行为。用法帮助:
$ ./commission-schemes.py --help
usage: commission-schemes.py [-h] [--data DATA] [--fromdate FROMDATE]
                             [--todate TODATE] [--stake STAKE]
                             [--period PERIOD] [--cash CASH] [--comm COMM]
                             [--mult MULT] [--margin MARGIN]
                             [--commtype {none,perc,fixed}] [--stocklike]
                             [--percrel] [--plot] [--numfigs NUMFIGS]
Commission schemes
optional arguments:
  -h, --help            show this help message and exit
  --data DATA, -d DATA  data to add to the system (default:
                        ../../datas/2006-day-001.txt)
  --fromdate FROMDATE, -f FROMDATE
                        Starting date in YYYY-MM-DD format (default:
                        2006-01-01)
  --todate TODATE, -t TODATE
                        Starting date in YYYY-MM-DD format (default:
                        2006-12-31)
  --stake STAKE         Stake to apply in each operation (default: 1)
  --period PERIOD       Period to apply to the Simple Moving Average (default:
                        30)
  --cash CASH           Starting Cash (default: 10000.0)
  --comm COMM           Commission factor for operation, either apercentage or
                        a per stake unit absolute value (default: 2.0)
  --mult MULT           Multiplier for operations calculation (default: 10)
  --margin MARGIN       Margin for futures-like operations (default: 2000.0)
  --commtype {none,perc,fixed}
                        Commission - choose none for the old CommissionInfo
                        behavior (default: none)
  --stocklike           If the operation is for stock-like assets orfuture-
                        like assets (default: False)
  --percrel             If perc is expressed in relative xx{'const': True,
                        'help': u'If perc is expressed in relative xx%
                        ratherthan absolute value 0.xx', 'option_strings': [u'
                        --percrel'], 'dest': u'percrel', 'required': False,
                        'nargs': 0, 'choices': None, 'default': False, 'prog':
                        'commission-schemes.py', 'container':
                        <argparse._ArgumentGroup object at
                        0x0000000007EC9828>, 'type': None, 'metavar':
                        None}atherthan absolute value 0.xx (default: False)
  --plot, -p            Plot the read data (default: False)
  --numfigs NUMFIGS, -n NUMFIGS
                        Plot using numfigs figures (default: 1) 
让我们进行一些运行,以重新创建原始佣金方案帖子的原始行为。
期货佣金(固定和有保证金)
执行和图表:
$ ./commission-schemes.py --comm 2.0 --margin 2000.0 --mult 10 --plot 
输出显示固定佣金为 2.0 货币单位(默认股份为 1):
2006-03-09, BUY CREATE, 3757.59
2006-03-10, BUY EXECUTED, Price: 3754.13, Cost: 2000.00, Comm 2.00
2006-04-11, SELL CREATE, 3788.81
2006-04-12, SELL EXECUTED, Price: 3786.93, Cost: 2000.00, Comm 2.00
2006-04-12, TRADE PROFIT, GROSS 328.00, NET 324.00
... 
股票佣金(perc 和无保证金)
执行和图表:
$ ./commission-schemes.py --comm 0.005 --margin 0 --mult 1 --plot 
为了提高可读性,可以使用相对%值:
$ ./commission-schemes.py --percrel --comm 0.5 --margin 0 --mult 1 --plot 
现在0.5直接表示0.5%
在两种情况下都是输出:
2006-03-09, BUY CREATE, 3757.59
2006-03-10, BUY EXECUTED, Price: 3754.13, Cost: 3754.13, Comm 18.77
2006-04-11, SELL CREATE, 3788.81
2006-04-12, SELL EXECUTED, Price: 3786.93, Cost: 3754.13, Comm 18.93
2006-04-12, TRADE PROFIT, GROSS 32.80, NET -4.91
... 
期货佣金(perc 和保证金)
使用新参数,基于 perc 方案的期货:
$ ./commission-schemes.py --commtype perc --percrel --comm 0.5 --margin 2000 --mult 10 --plot 
毫无疑问,通过改变委员会……最终结果发生了变化
结果表明,佣金现在是可变的:
2006-03-09, BUY CREATE, 3757.59
2006-03-10, BUY EXECUTED, Price: 3754.13, Cost: 2000.00, Comm 18.77
2006-04-11, SELL CREATE, 3788.81
2006-04-12, SELL EXECUTED, Price: 3786.93, Cost: 2000.00, Comm 18.93
2006-04-12, TRADE PROFIT, GROSS 328.00, NET 290.29
... 
在上一次运行中,设置 2.0 货币单位(默认值为 1)
另一篇文章将详细介绍新课程和 homme 熟食佣金计划的实施情况。
示例的代码
from __future__ import (absolute_import, division, print_function,
                        unicode_literals)
import argparse
import datetime
import backtrader as bt
import backtrader.feeds as btfeeds
import backtrader.indicators as btind
class SMACrossOver(bt.Strategy):
    params = (
        ('stake', 1),
        ('period', 30),
    )
    def log(self, txt, dt=None):
        ''' Logging function fot this strategy'''
        dt = dt or self.datas[0].datetime.date(0)
        print('%s, %s' % (dt.isoformat(), txt))
    def notify_order(self, order):
        if order.status in [order.Submitted, order.Accepted]:
            # Buy/Sell order submitted/accepted to/by broker - Nothing to do
            return
        # Check if an order has been completed
        # Attention: broker could reject order if not enougth cash
        if order.status in [order.Completed, order.Canceled, order.Margin]:
            if order.isbuy():
                self.log(
                    'BUY EXECUTED, Price: %.2f, Cost: %.2f, Comm %.2f' %
                    (order.executed.price,
                     order.executed.value,
                     order.executed.comm))
            else:  # Sell
                self.log('SELL EXECUTED, Price: %.2f, Cost: %.2f, Comm %.2f' %
                         (order.executed.price,
                          order.executed.value,
                          order.executed.comm))
    def notify_trade(self, trade):
        if trade.isclosed:
            self.log('TRADE PROFIT, GROSS %.2f, NET %.2f' %
                     (trade.pnl, trade.pnlcomm))
    def __init__(self):
        sma = btind.SMA(self.data, period=self.p.period)
        # > 0 crossing up / < 0 crossing down
        self.buysell_sig = btind.CrossOver(self.data, sma)
    def next(self):
        if self.buysell_sig > 0:
            self.log('BUY CREATE, %.2f' % self.data.close[0])
            self.buy(size=self.p.stake)  # keep order ref to avoid 2nd orders
        elif self.position and self.buysell_sig < 0:
            self.log('SELL CREATE, %.2f' % self.data.close[0])
            self.sell(size=self.p.stake)
def runstrategy():
    args = parse_args()
    # Create a cerebro
    cerebro = bt.Cerebro()
    # Get the dates from the args
    fromdate = datetime.datetime.strptime(args.fromdate, '%Y-%m-%d')
    todate = datetime.datetime.strptime(args.todate, '%Y-%m-%d')
    # Create the 1st data
    data = btfeeds.BacktraderCSVData(
        dataname=args.data,
        fromdate=fromdate,
        todate=todate)
    # Add the 1st data to cerebro
    cerebro.adddata(data)
    # Add a strategy
    cerebro.addstrategy(SMACrossOver, period=args.period, stake=args.stake)
    # Add the commission - only stocks like a for each operation
    cerebro.broker.setcash(args.cash)
    commtypes = dict(
        none=None,
        perc=bt.CommInfoBase.COMM_PERC,
        fixed=bt.CommInfoBase.COMM_FIXED)
    # Add the commission - only stocks like a for each operation
    cerebro.broker.setcommission(commission=args.comm,
                                 mult=args.mult,
                                 margin=args.margin,
                                 percabs=not args.percrel,
                                 commtype=commtypes[args.commtype],
                                 stocklike=args.stocklike)
    # And run it
    cerebro.run()
    # Plot if requested
    if args.plot:
        cerebro.plot(numfigs=args.numfigs, volume=False)
def parse_args():
    parser = argparse.ArgumentParser(
        description='Commission schemes',
        formatter_class=argparse.ArgumentDefaultsHelpFormatter,)
    parser.add_argument('--data', '-d',
                        default='../../datas/2006-day-001.txt',
                        help='data to add to the system')
    parser.add_argument('--fromdate', '-f',
                        default='2006-01-01',
                        help='Starting date in YYYY-MM-DD format')
    parser.add_argument('--todate', '-t',
                        default='2006-12-31',
                        help='Starting date in YYYY-MM-DD format')
    parser.add_argument('--stake', default=1, type=int,
                        help='Stake to apply in each operation')
    parser.add_argument('--period', default=30, type=int,
                        help='Period to apply to the Simple Moving Average')
    parser.add_argument('--cash', default=10000.0, type=float,
                        help='Starting Cash')
    parser.add_argument('--comm', default=2.0, type=float,
                        help=('Commission factor for operation, either a'
                              'percentage or a per stake unit absolute value'))
    parser.add_argument('--mult', default=10, type=int,
                        help='Multiplier for operations calculation')
    parser.add_argument('--margin', default=2000.0, type=float,
                        help='Margin for futures-like operations')
    parser.add_argument('--commtype', required=False, default='none',
                        choices=['none', 'perc', 'fixed'],
                        help=('Commission - choose none for the old'
                              ' CommissionInfo behavior'))
    parser.add_argument('--stocklike', required=False, action='store_true',
                        help=('If the operation is for stock-like assets or'
                              'future-like assets'))
    parser.add_argument('--percrel', required=False, action='store_true',
                        help=('If perc is expressed in relative xx% rather'
                              'than absolute value 0.xx'))
    parser.add_argument('--plot', '-p', action='store_true',
                        help='Plot the read data')
    parser.add_argument('--numfigs', '-n', default=1,
                        help='Plot using numfigs figures')
    return parser.parse_args()
if __name__ == '__main__':
    runstrategy() 



