This code will invert download amount to upload amount. it is good to maintain ratio while you want downloading at the same time
Code:%S%cinfo_hash=%.20U&peer_id=%.20U&port=%d&downloaded=%Ld&uploaded=%Ld&left=%Ld&corrupt=%Ld&key=%.8X%s&numwant=%d&compact=1&no_peer_id=1