Using variable to TSQL + XQuery

Question

All,

I have the following code:

--xml is already declared and populated with an xml document

SELECT
ent.query('TradeId').value('.','VARCHAR(10)') TradeId
FROM                 
@xml.nodes('//table/trade[1]') Col(ent)  

How can I have the expression //table/trade[1] as a variable so I can increase the [1] in a loop ? For example I would like something like the below which is not working:

DECLARE @KLM varchar(100)
SET @KLM= '//table/trade[1]'
SELECT
ent.query('TradeId').value('.','VARCHAR(10)') TradeId
FROM                 
@xml.nodes(@KLM) Col(ent) 

Any ideas?

Thanks,

M