The Center of Gravity Oscillator was created by John Ehlers (Cybernetic Analysis For Stocks And Futures pg 49) and this provides a pretty accurate way to see how the stock is trending. If the indicator stays above 0 then the stock is in a pretty strong uptrend and if it stays below 0 then the stock is in a pretty strong downtrend. Buy when the indicator changes from red to green and sell when it changes from green to red.
Let me know if you would like me to publish any other indicators or if you want something custom done!