Rather than just taking what the market gives you, if and when any of y'all see the light about the SM, consider what's called "dollar cost averaging".
You can d a search on it. Investopedia is great on all things investing, their effort on it is here: (click the box)
[[Nb it talks about ETFs (Exchange Traded funds which are just collections of shares,). Forget that if you're only going to use one "instrument" like VWRL, which is like the ultimate ETF - it's all of them
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As MBK said, it's wise to leave an order, called a
Limit Order, whenever you buy anything, to attempt to BUY THE DIPS.
If you buy at the top of a spike it might take a month to rise clear of it.
THIS is an UPTREND, okay. Like the whole SM, it goes up over time.
If you buy anywhere, you get filthy rich
eventually.
I know because I put the maths in to make the wiggly line.
Whether I'm rich as well as filthy - it's all relative.

If you look only at recent prices, you can see small dips, and then bigger ones, as you buy at Red, Green, Blue. But you can be going downhill in the short run.
Keep the faith.
Eventually you might have a little prayer and say soddit and buy at black and walk away and come back in 10 screens time and you're well up.
From the other side of the room in hindsight, that's obvious. But when you're just looking at today's price, you can't tell.
TRY to work it out by looking backwards, maybe over a month or a year.
With a bit of luck you'll see a bit of a LEVEL it comes up from, or something of a CHANNEL it's moving in. That's why traders draw lines all over their charts. You draw between the highest highs, then the lowest lows, to see that channel.
It can be frustrating as hell.
Dollar cost Averaging says to buy once a week/month or whatever. But you will do a bit better if you wait for a "local" dip, bottom of the channel, etc.
It's worth
SOME patience.
Is that clear??