Knowing other attributes supported by the broker

For placing an order, the following attributes are needed: order transaction type, order variety, order type, and order code. Different brokers may support different types of order attributes. For example, some brokers may support just regular orders, while others may support regular and bracket orders. The value for each of the attributes supported by the broker can be queried using the broker specific constants provided by the pyalgotrading package.

How to do it…

We execute the following steps to complete this recipe:

1. Import the necessary class from the pyalgotrading module:

>>> from pyalgotrading.broker.broker_connection_zerodha import BrokerConnectionZerodha

1. List the order transaction types:

>>> list(BrokerConnectionZerodha.ORDER_TRANSACTION_TYPE_MAP.keys())

We'll get the following output:

[<BrokerOrderTransactionTypeConstants.BUY: 'BUY'>,
 <BrokerOrderTransactionTypeConstants.SELL: 'SELL'>]

1. List the order varieties:

>>> list(BrokerConnectionZerodha.ORDER_VARIETY_MAP.keys())

We'll get the following output:

[<BrokerOrderVarietyConstants.MARKET: 'ORDER_VARIETY_MARKET'>,
 <BrokerOrderVarietyConstants.LIMIT: 'ORDER_VARIETY_LIMIT'>,
 <BrokerOrderVarietyConstants.STOPLOSS_LIMIT: 'ORDER_VARIETY_STOPLOSS_LIMIT'>,
 <BrokerOrderVarietyConstants.STOPLOSS_MARKET: 'ORDER_VARIETY_STOPLOSS_MARKET'>]

1. List the order types:

>>> list(BrokerConnectionZerodha.ORDER_TYPE_MAP.keys())

We'll get the following output:

[<BrokerOrderTypeConstants.REGULAR: 'ORDER_TYPE_REGULAR'>,
 <BrokerOrderTypeConstants.BRACKET: 'ORDER_TYPE_BRACKET'>,
 <BrokerOrderTypeConstants.COVER: 'ORDER_TYPE_COVER'>,
 <BrokerOrderTypeConstants.AMO: 'ORDER_TYPE_AFTER_MARKET_ORDER'>]

1. List the order codes:

>>> list(BrokerConnectionZerodha.ORDER_CODE_MAP.keys())

We'll get the following output:

[<BrokerOrderCodeConstants.INTRADAY: 'ORDER_CODE_INTRADAY'>,
 <BrokerOrderCodeConstants.DELIVERY: 'ORDER_CODE_DELIVERY_T0'>]

How it works…

In step 1, we import the BrokerConnectionZerodha class from pyalgotrading. This class holds the order attributes mapping between pyalgotrading and broker specific constants as dictionary objects. The next steps fetch and print these mappings. Step 2 shows that your broker supports both BUY  and SELL order transaction types.

Step 3 shows that your broker supports MARKET, LIMIT, STOPLOSS_LIMIT, and STOPLOSS_MARKET order varieties. Step 4 shows that your broker supports REGULAR, BRACKET, COVER, and AFTER_MARKET order types. Step 5 shows that your broker supports INTRADAY and DELIVERY order codes.

The outputs may differ from broker to broker, so consult your broker documentation if you are using a different broker. A detailed explanation of all these types of parameters will be covered in Chapter 6, Placing Trading Orders on the Exchange. This recipe is to just give an overview of the parameters, as they are needed in the subsequent recipes of this chapter.