Just use a yahoo notification or equivalent to let you know when the stock has dropped 5 or 6% and make the trade on your own. As others have stated, stop loss orders will only burn you on a stock like this with a small float and easily manipulated.
As mentioned already 6 - 8 % is standard. You should only use this as a tracking point and not set automatic stop loss selling on your brokerage account. KOG is too volitil and you will get taken out with a loss. My formula for KOG is to always buy under $9 or $8.90 and sell when over $9.20 Bought last week at $8.65 and will be selling soon for a tidy 1 week gain.