Can a broker intentionally not fill your orders?

bmoney said:
Since 0 commission trading happened, I started scalping. I’ve become exceptionally good at it, to the point where I am moving around 1 million shares or more profitably in a single ticker on any given day. Since I’ve reached that mark, however, I’ve noticed that tickers who reach a threshold of around 1-1.5 million shares traded suddenly stop filling orders. This has happened on multiple tickers. The thing is, the price action and volume on it don’t change, and I would know as Ive been trading these names day in and day out for over half a year with no hiccups. It’s like my orders are being completely ignored. In addition, I can trade those same tickers without any trouble by using other accounts. It’s only on the account that has traded it a lot that the orders seem to stop going through. The broker that is giving me issues is Tradestation. Has anyone else heard of something like this happening? Are they limiting me cause they can no longer profit off the commissions? Any help is appreciated.

Edit: I should also note that once the tickers stop working, they stop working indefinitely. I can’t get filled even on the open of close of any day following the day it was traded beyond that 1-1.5 million share threshold, no matter how aggressive the volume is. For reference, on a very slow day with these stocks, I still would at least get filled for approximately 10-20k shares per go for the open and close.

***Edit 2: I also forgot that I was recently notified that I must register with the sec and obtain a “large trader ID”. I received this notification one day before the first ticker I normally traded stopped filling my orders. I’m still in the process of registering. Could this be relevant to the issue I’m having, where the broker may be trying to prevent me from exceeding a certain limit till I provide them the ID?
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update: turns out the market makers don’t like my scalping. Got a call from the compliance department at tradestation. They threatened to take me off the platform unless I stop cause the MM were complaining to them, and accused me of possibly spoofing cause of how I place orders to get filled quickly. Doesn’t sound like there is a way around it. Off to a new broker I go
 
bmoney said:
update: turns out the market makers don’t like my scalping. Got a call from the compliance department at tradestation. They threatened to take me off the platform unless I stop cause the MM were complaining to them, and accused me of possibly spoofing cause of how I place orders to get filled quickly. Doesn’t sound like there is a way around it. Off to a new broker I go
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Would love a screenshot of your communications with Tradestation regarding this matter.
 
Math_Wiz said:
Would love a screenshot of your communications with Tradestation regarding this matter.
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It was via the phone. Called the trade desk this morning as my account was on a hold and they had some head manager give me a call and give me the run down. The market makers, IMO, threw around the accusation of spoofing, even though my orders that I’m placing in my 100k account are minuscule to the 500k-1mil+ share bid or ask I’m joining, to use as a guise to justify not allowing me to continue scalping since it competes with them. At the end of the day, I was treated like a card counter in a casino.
 
Temujin79 said:
So they've set your account to liquidation/sale positions only or are you allowed to keep trading again as long as you don't scalp?
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The latter. I just can’t scalp anymore. That’s how I made all my money though. That scalping strategy was yielding 5-10% of my account value or more per day just before my issue I described in this post, so I sure as hell ain’t going back to position trading, as it has never yielded gains that high for me. The account as far as I can tell is useless now unless I want to take swing position or scalp large caps. Eventually moving to futures instead
 
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Mirthsmith said:
To all the traders who favour 0 commission trading, where do you think the broker would earn its income from, there obviously has to be some way for them to be making their money. I am not a share scalper but forex so I am no expert here but I find it extremely hard to believe that anything can be had for free. Like with forex, be it 0 commission and wide spreads like with Robinhood or low commissions and tighter spreads as in with Fxview, there is after all a cost that is being paid to the broker. If that is missing, something is bound to be amiss.
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%%
Plenty of ways;
if you owned a % of say qqq @$30 basis/capital gains[over $3o7.033 last i looked]
[2]Most dont pay much on your cash balance /so every little bit helps.
[3]Plenty of broker + bank calenders are given 'free''
[4]
Ditto for UPRO
Ditto for SPY
[5]SCHW has a bank
[6/7]
IBKR has a credit card/margin loans.
[8] But generally/ you are right no free lunch + the broker paid for the ''free'' calenders/ads
 
bmoney said:
update: turns out the market makers don’t like my scalping. Got a call from the compliance department at tradestation. They threatened to take me off the platform unless I stop cause the MM were complaining to them, and accused me of possibly spoofing cause of how I place orders to get filled quickly. Doesn’t sound like there is a way around it. Off to a new broker I go
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bmoney said:
update: turns out the market makers don’t like my scalping. Got a call from the compliance department at tradestation. They threatened to take me off the platform unless I stop cause the MM were complaining to them, and accused me of possibly spoofing cause of how I place orders to get filled quickly. Doesn’t sound like there is a way around it. Off to a new broker I go
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you could go to virtu and have them execute for you!
 
since you have stated clearly that you are no longer doing this strategy why not post your actual time and sales so all of us can learn what not to do at trade station.

I am wondering at this point the validity of what you are saying because no way would trade station ever accuse anyone of spoofing or say that mm think you are spoofing. that is something they would never say.

At this point we dont have a SHRED of evidence from you as far as a single execution and maybe you have beef with tradestation?

I hope you are not slandering this company and their easy language platform.
I used them years ago for mild easy language programmed trades and enjoyed the company a lot. i doubt this is actually happening.

Also i am not even sure you can spoof in stocks since they have 40 plus venues all with different pricing unlike the futures mkts
 
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