Thank you! That was a very interesting read.
Other than the lump sum required to open a vanguard account I actually don't have a lump sum to invest! It seems the best thing to do will be transfer money to my index fund immediately every time I'm payed (every 2 weeks), rather than holding on to it to invest either every month or week.
In that case, you are not dollar cost averaging. You are lump sum investing at regular intervals. The term DCA is often erroneously used when people mean investing small amounts, as they get them, over time, but that's a mistaken use of the term.
https://en.wikipedia.org/wiki/Dollar_cost_averaging#ConfusionInvest according to your investment policy statement, as soon as you can after being paid. That's lump sum investing and over time, will statistically perform best (it would only become DCA if you *held* a portion of those funds in order to space out their investment over time).