Regarding P/(L) and Shares Traded
Using the e-mini model as a base, you can trade 1 e-mini contract for $500 at a number of reputable brokers, not that I would recommend it (I wouldn't), but you have that much (or rather, little) margin to work with in the worst case scenario, and I never want to go lower than double that amount (safety, safety, safety).
So start off with a margin account of $2,000 per e-mini contract. Trade your setup(s) until one of the following two scenarios happens:
Scenario 1. You make another $2,000, at which point you can add another contract, so forth and so on until you can trade 10 contracts at a pop.
Scenario 2. You lose up to $1,000, at which point you have to add another $1,000 to build your base back up. (While you are doing this you will also need to find a different trading methodology, one which has a greater positive expectancy).
The Money Management grid looks like this:
(US$) # of Contracts
$2,000 1
$4,000 2
$6,000 3
$8,000 4
$10,000 5
$12,000 6
$14,000 7
$16,000 8
$18,000 9
$20,000 10
Once you build your equity up to $4,000, you can start trading 2 contracts. If your margin goes down to $3,000 or less, you can only trade 1 contract until you build your equity back up to $4,000.
Once you build your equity up to $6,000, you can start trading 3 contracts. If your margin goes down to $5,000 or less, you can only trade 2 contracts until you build your equity back up to $6,000.
Etc.
P.S. From the previous post, if your setup doesn't happen on a given day, DON'T TRADE! Just wait for your setups