It seems to me that relatively pure DCA practices would account for either cases in which:

1) you have some set dollar amount that you buy BTC at some set period whether daily, weekly or some other period

or

2) you buy based on when your money comes available, so the date and the amount would vary, but perhaps you would have a formula that allows you to figure out how much extra that you have available (accounting for monthly expenses to determine how much is left available, of course).

Surely the more that you vary either 1 or 2, then you are perhaps overly bringing your own discretion into the mix, and it still may well fit DCA depending on the extent to which you may well have some kind of a system in which you are trying to stay consistent but giving yourself some flexibility within some somewhat objective criteria.

Even though I am saying that I am skeptical, ultimately you are the one who is going to have to make those kinds of planning and/or execution choices and figure out if you actually ended up "backing up the truck" or whatever it was that you were planning to do in order to acquire .00324864 additional BTC.