Limit wiggle and keyframe move

I am using following expression to wiggle my object on the Y axis:

Quote:

w = wiggle(.5,300);
[value[0], w[1]]


How can i limit the wiggle so that it doesn`t go below and above certain value?

2nd question, I am using VideoCopilot SureTarget with about 30 compositions, is it possible to point keyframe to a slider and then the keyframe moves to a frame which is slider value. And then point the second keyframe to the first.
I would like to have sliders, and control the time when the transition from the target to target is happening.

Thanks for help.

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