I love you SSS plan http://bitcoinsavingsplan.com. 
I am using it for Nxt now. Too bad there is not an option to add other crypto's like Nxt.
I am using it for Nxt now. Too bad there is not an option to add other crypto's like Nxt. Thanks, I think it should still work fine as long as you ignore the BTC units
I just updated it today based on some requests to be able to modify the "doubling" to other values. You can now modify the cycle multiplier to trigger a sell on 2x, 1.5x, 1.1x, etc.
Also, if you want to set up a fixed withdrawal rate in fiat, there is an option under the cycle multiplier to calculate that for you based on a given rake %.
I really like this tool, also.
I do have one suggestion that may make the tool even more amazing, and that would be able to individually modify the multiplier for each cycle. In that regard, each line would have its own multiplier and I would NOT want to rake very much in earlier cycles; however, in later cycles my rake multiplier would be higher. So, if I could set the multiplier on each line, then I would really be able to customize the plan to my individualized preference(s)
Next you will want your customizations to be saved for you, because you will feel it's too annoying to redo all the tweaking tomorrow, when you have a new idea. I think the tool is good as it is. If you want something more personalized, you can create your own spreadsheet. Takes just a few minutes. If you want it to be accessible from anywhere, use Google Docs or some other similar service.