+/- before the Memory Clock value indicates an offset memory clock. If it is simply the number, it indicates a locked memory clock.
Command Line Launch String:
Replace [Wallet] with your wallet address and [Worker] with your worker name
miner.exe --algo kheavyhash --server pool.us.woolypooly.com:3112 --user [Wallet].[Worker] --api 9999 --lock_mclock 810 --cclock 300 --lock_cclock 570