If you receive salary monthly and you think by dividing the money you have set aside for your Bitcoin accumulation into weeks will earn you more Bitcoin through the hope that there will be a dip within the week were you can buy at low price then you are just a trader.
Have you thought of you dividing it and in the course of you buying weekly with the money met for the month and Bitcoin price goes up will you wait for it to come down before you buy or you will still go ahead and buy, there's no need dividing it if you receives your salary monthly because there's no difference in the monthly and weekly accumulation except you are a trader who is waiting for a dip to happen.
Maybe you should go pick up the internet and do some uncovering, dividing our income into separate phases in order to accumulate differently has nothing to do with trading. Who among does not like to accumulate Bitcoin when it is cheap, everyone does including the traders and those who tend to hold for a long period. Nothing is wrong with dividing our investment funds, during those weeks it is no doubt that we can never buy at same prices, one has to be lower and some higher but that gives the investor a better chances of accumulating quite the amount of Bitcoin.
For your instance given, what if it goes the other way around and the price drops below the initial you should have bought all at once, the market is 50/50 and you just have to go with it, either high or low.