How long should I backtest a online daytrading system?

I am frequently asked how long one should backtest a online daytrading system. Though there’s no easy answer, I will provide you with some guidelines. There are a few factors that you need to consider when determining the period for backtesting your online daytrading system:
Trade frequency
How many trades per day does your daytrading system generate? [...]

An Analysis Of Overstock.com (OSTK)

Why is a value investor writing about an unprofitable internet company? Because value investing is about finding dollars that trade for fifty cents; with a market cap of less than 75% of sales, Overstock.com (OSTK) looks like it may be exactly that.
But isnt it too risky?
The greatest risk in any investment is the risk [...]