Improve example README

README.md

@@ -61,25 +61,25 @@ Some examples of request models corresponding to methods:
 * ``GetOrdersRequest`` for ``TradingClient.get_orders()``
 * ``CryptoLatestOrderbookRequest`` for ``CryptoHistoricalDataClient.get_crypto_latest_orderbook()``
 
-**Usage Example**
+**Request Models Usage Example**
 
-To submit an order, you will need to provide a `MarketOrderRequest` object.
+To get historical bar data for crypto, you will need to provide a ``CryptoBarsRequest`` object.
 
 ```python
-from alpaca.trading.client import TradingClient
-from alpaca.trading.requests import MarketOrderRequest
-from alpaca.trading.enums import OrderSide, TimeInForce
+from alpaca.data.historical import CryptoHistoricalDataClient
+from alpaca.data.requests import CryptoBarsRequest
+from alpaca.data.timeframe import TimeFrame
 
-client = TradingClient('api-key', 'secret-key')
+# no keys required for crypto data
+client = CryptoHistoricalDataClient()
 
-request_params = MarketOrderRequest(
-                        symbol="SPY",
-                        qty=3,
-                        side=OrderSide.BUY,
-                        time_in_force=TimeInForce.DAY
-                        )
+request_params = CryptoBarsRequest(
+                        symbol_or_symbols=["BTC/USD", "ETH/USD"],
+                        timeframe=TimeFrame.Day,
+                        start="2022-07-01"
+                 )
 
-client.submit_order(order_data=request_params)
+bars = client.get_crypto_bars(request_params)
 ```
 
 ### Data Validation <a name="data-validation"></a>