Hi Chris,
Since I think I read on your other thread that you just added CYA on 9-29 and today is only 10-2, I'd recommend you wait at least 7 days from the last add to make sure it's all registering in there before adding anymore CYA.
Once you're sure all the CYA you added on the 29th is registering: For your now CYA of 60ppm, your Target FC is 3-4ppm, since you are planning on adding a little more CYA in the near future to get to the CYA 70ppm range after the add you'll need to Target 3-5ppm per the chlorine/cya chart.
http://www.troublefreepool.com/content/128-chlorine-cya-chart-slam-shock
A CYA of 70ppm is where I'd recommend you target for on your next add (again, after you are sure all the other is registering from the last add). The important thing is to be sure to not overshot the CYA level because it is much easier to add more when you check it in a week should it be a little too low then it is to remove it back out should it get too high. If it gets too high the Only way to remove it is to drain it out, and refill with new water which is never fun to have to do.

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On maintaining the chlorine levels as long as you maintain your level above the minimum level for your current, or anticipated CYA-If you've added CYA that is not yet registering Target your FC for that anticipated CYA level), If you keep it above the minimum at all times, you should be fine at remaining algae free. It's when the FC level drops below that minimum level for your CYA level that algae can begin to grow.
On days with higher bather loads, heavy rain, etc. it is beneficial to target your FC at 1-2ppm above the Target level as to try to prevent ever having that below minimum drop in chlorine. Being disabled, and also not having a SWG, I always Target my FC at the 1-2ppm higher than recommended level to try to prevent my pool from ever dropping below the minimum for my CYA level which so far has worked out well.
I hope this helps, and have a wonderful night.
