So i don't have your test kit, but answer me this when you say FC is clear, that means there is no chlorine in the pool correct?
I assume you are following instructions that came with the pool to get salt level high enough for the SWG to work.
We use the
http://www.poolcalculator.com/ to determine how much of what chemical needs to be added to the pool.
If you have no chlorine in the pool, which i think it was your test is telling you, and your pool is greenish indicating algae (unless you have metals in your water, what is your fill water source?) then your pool is not really safe to swim in. Now would i go out in swim in a pond, sure.
You need to utilize the pool calculator to determine how much chlorine you need to add to get to shock level. First you need to know your pools water volume. At the bottom of the pool calculator is a place where you can enter in your pool dimensions and it will give you an estimate.
On the left side of the pool cal you enter your current readings, on the right side you enter in your goal (or desired readings), then it tells you how much of each chemical to add to get you there based on all the parameters you entered in.
Here are the recommend levels for pools
pool-school/recommended_levels
This is the chart you reference to determine the chlorine level for shocking your pool
pool-school/chlorine_cya_chart_shock
You can add CYA (stablizer) to your pool to raise the CYA level to your target. You can put the granuals in an old sock or stocking and tie that in the pool directly if front of a return. You can squeeze the sock several times a day to help it dissolve. It can take a week to show up for testing, so when determining target chlorine levels after you have put CYA in just assume the CYA is there even though it doesn't show up in testing.