Ok, did some screenshots of the last 6 days of trading. Click to embiggen.
First up is Algo liquidity buying/selling, aka market orders, as I understand it. I personally correlate this with *urgent* MM delta hedging of calls/puts. Note how it follows price, making step changes when price makes larger changes. Beyond MM algos, this likely also includes more aggressive trading algos.
On interesting spike was late last Friday, which is to be expected given effects of gamma so close to expiration.
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Next up is dark pool liquidity. I find this one interesting as it shows very clear buying and selling spikes, including 3 different days of late day short covering, done at times of high liquidity such that price is not impacted as much by covering. These spikes are most likely from trading firms, not institutions selling positions.
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Next is Market Pressure. This is the one I didn't listen to. I loaded up on weekly calls on the dip Monday when this spiked, but I should've been out of weekly calls by noon yesterday when this accumulator wasn't improving and still down trending. Furthermore, I should've been out of medium term calls (Oct, Nov, Dec, J18) this morning when things kept going downhill, rather than staring at it in disbelief. (or whatever I was doing). But really, I should've bought weekly puts yesterday when MP kept heading down, along with all the selling on buy/sell...
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Next is algo buy/sell. This tries to identify algo related trades - trades that are put out on the order book as limit bid or offers. This is another major directional indicator for me during the day, and another I ignored this week. Tuesday is a common look for downgrade days. The spike at the end of today is common on days like this, I'm guessing mean reversion algos - that range commonly trades back out (is sold) if the beginning of the next trading day doesn't make rapid upward progress, so if we're down Monday, that could add a bit of insult to injury.
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Finally, dark pool buy/sell. This one is commonly always down, so I usually don't pay much attention unless it's doing anything out of the ordinary. There's always institutions selling, especially in an uptrend, and they typically do it carefully for obvious profit reasons, and I suspect many institutions accumulate shares using buying algos, so their activity may not even show up here. Out of the ordinary, I would classify as the last 3 days. Monday and Tuesday look pretty typical for this accumulator, as does last Friday, maybe with the exception of that sell spike. The buy spike yesterday before close was a bit interesting, I'd probably classify that as short covering by a trading firm.
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I'm leaving raw tick out because it's basically useless over long time periods. I only use it for context intraday, no more than 5-15 minutes at a time.
Finally, if this software looks helpful, do consider trying it out for a month. Well worth it if you swing or daytrade much.
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