target.xml

<flow name="getStockInfo">
	<http:listener path="stock" method="GET" config-ref="httpListener">
		<http:response>
			<http:body>
				<![CDATA[
	                %dw 2.0
	                output application/json
	                ---
	                {
	                    "ticker": attributes.queryParams.ticker,
	                    "price": vars.price as Number,
	                    "variation": vars.variation as Number
	                }
        		]]>
			</http:body>
		</http:response>
	</http:listener>
	
	<http:request path="price" config-ref="httpRequester" target="price">
		<http:query-params>#[{'ticker': attributes.queryParams.ticker}]</http:query-params>
	</http:request>

	<http:request path="variation" config-ref="httpRequester" target="price">
		<http:query-params>#[{'ticker': attributes.queryParams.ticker}]</http:query-params>
	</http:request>	
</flow>