not 100% sure what u mean by this. The fib lines can only go one direction, u cannot make them cover both sides.
If there is an area on the chart to the left you have to move the fib tool further over to the left, and stretch the 2 points on the fib tool.
yeah it can do this It cant do both sides of the line, it will do one side or the other, U have to pull one of the dots on the line over to the other side of the other dot.
Have a play around with it.
As far as charting packages go MT4 is kick ass, cause its free and its easy to create ur own indicators and expert advisors.
To my knowledge, the fib retracement tool in MT4 only extends into the future and not the past. To extend into the future, make sure you have the ray setting checked in your fib properties. You can however use the fib channel tool to get the levels into the past. You'll have to input all the levels you want, and it's a little tricky to work with, but it will do the trick.