Trading opening gaps - is it a viable strategy?

I think we agree.

On this we do agree.

 

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Exactly

 

If you think about it (hint the topic title) price does sometimes move without volume.

 

there are 5 rooms with the word gap in their name; none of them trade the gap and there is no track record of gap performance anywhere. Same for Fib, Gann, etc.

 

No idea if you just limit it to these ETFs.

In general backtesting fading the opening gap is a winning strategy if you include super liquid stocks (go long/short at open and close trade at previous close price on penny wide bid/ask stocks).
It's not something that you can easily trade in real life though, even if you fully automate

 

Scott Andrews knows his stuff - Gaps. Research and all:-

http://dl.fxf1.com/files/books/english/Andrews, Scott - Understanding Gaps.pdf

 

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Seldom if ever; looks like he is mostly right. But i seldom get the opening print, maybe you do\LOL.
That'$ the good thing about capital markets;
even if it looks like i sometimes get an early or open print order the ETFs had plenty of volume before i ever put my order in........................................