This is really old, from around the end of 2014 it appears.
Also there is no HFT in cryptos: there is no colocation and not a single exchange can support either the market data dissemination or order processing capabilities right now. Every crypto exchange is horribly slow and appears to be terribly written.
Not by any definition I've seen. There's always the notion that hft techniques have always existed and there is some validity to that but usually when referred to in a modern context it relies on qualities that make speed of light (hence colocation) a limiting factor.
On a modern exchange it does mean that because that's what it takes to trades as fast as possible, on a low tech bitcoin exchange where such speeds are not possible, it takes much less; it's HFT none the less. It's still computer programs trading the same algorithms offering up liquidity to flip a quick profit as fast as the tech allows.
Bitcoin exchanges are full of manual TA chart traders, to them everyone running algo's is a HFT; context matters, you can't compare the nascent tech in Bitcoin to a modern Wall Street exchange. If you're algo trading as fast as technically possible on the exchange, you're HFT'ing. Words have meaning, you can't get any higher frequency than as fast as the exchange allows.
HFT'ers collocate because it gives them an edge, they were HFT'ers before they discovered that edge, collocating isn't what makes it HFT. Trying to trade faster than your competitor, competing on speed, that's what makes something HFT.
> Is this kind of thing still possible, or do exchanges prevent it these days?
Why would exchanges want to prevent this?
As far as I can see, it’s speculators battling against speculators. Why not just let the best speculator win? It’s not like it affects my ability to sell or buy bitcoins on Bitstamp — and I hope we can agree that there is no “right” price of a bitcoin — so what’s the incentive to stop it, other than to assist particular speculators (with particular strategies) in making profits?
Not really. On most exchanges, the transactions never hit the blockchain - it's all internal accounting within the exchange.
All this speculatory activity creates liquidity, at least on the exchanges where the speculation is taking place. That's generally good for outsiders who need to exchange bitcoin for something else (on said exchange).
Except for a few flash-crash scenarios (or failures of the exchange), this shouldn't have much impact on price volatility on day/week scales that average people care about.
I think it's possible for exchanges to exacerbate volatility. If all the trading were consolidated to a single exchange (like the NYSE or NASDAQ in America), it would mean that there would be more liquidity to the downside and price resistance to the upside, but instead everything is split up between 5 major exchanges. So if someone places a large order on one exchange, the others will mirror it, so effective liquidity is cut by 80%. This works to the upside too. A way to fix this would be to split the transactions evenly among all majors exchanges, executing all the orders at once instead of only at a single exchange, but most large traders probably don't do this.
I keep hearing about these high transaction fees but I've never seen them. When I send the equivalent of tens/hundreds of thousands of USD I pay a few cents of a dollar. It does take a few hours, sure. But what would it take in a fiat currency: walk to the bank, explain why you are sending so much money, set-up the order, wait a few days. No doubt with fees in the hundreds of dollars.
So as far as I can tell fees are still ridiculously small. Large transactions are usually not that urgent.
> But what would it take in a fiat currency: walk to the bank, explain why you are sending so much money, set-up the order, wait a few days. No doubt with fees in the hundreds of dollars.
When was the last time you sent a wire? For accounts with $15,000 minimums it's usually free, can be set up from your phone and, depending on your bank, either clears within minutes or by close of business.
It's more complex than that. Both Bitcoin Core and Bitcoin cash teams want to scale things up, Bitcoin cash is doing it one way and Core another way (look for "Lightning Network"). Nobody in both camps want Bitcoin to remain a store of value, we all want it to replace fiat.
"Related to fleeting orders (inevitable order cancellations), laying involves adding volume at various price levels with the sole intention to influence other market participants into believing (observing) an order book imbalance or strong buying/selling pressure."
As a trader, this is something you should be learning to spot.
Not everyone does and there can be multiple layers of reverse psychology even if there is. Is this wall fake? If so, are they trying to fake that there is sell support? Or do they know people will think that and there really is sell support?