Website/app to watch calendar spreads datas

Hello,

I am looking for a cheap ( or free ) website or application to see daily calendar spread datas on ag contracts. I would like to be able to watch native calendar spreads( OHLC candlesticks) with native volume. Not a software with implied prices of spreads based on legs( like IB TWS, scarrtrading, brite futures...).

Thanks a lot for your help.
 
For those looking for the same thing , download barchart trader. It's a free delayed charting software with extensive exchanges coverage and native daily spread datas( watch only, if you want to export you need to pay for real time version ).
 
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