High Frequency Algorithms Tampering with the Tape & Chart Setups

By Gilbert Gman Mendez

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The word on the street is that intraday traders are frustrated. The rules of the game have changed. Most high probability chart setups in between important levels are being manipulated by the high frequency algorithms. If you are an active intraday trader reading this, I guarantee you have been a victim to what I call the screw job program. Let me explain.

The highest probability trade for a well capitalized algorithm is the trade where it is guaranteed emotional order flow. By emotional I’m referring to the order flow that comes out of positions where traders just want out – our stop orders.

Consider all of the high probability plays: flags on strong/weak stocks after a drive, consolidation, support/resistance at important levels. We all trade them. We size up as the play develops in our favor and we trade them quite similarly when the play goes against us. We bang out of the stock when we assume we are wrong (especially when we have size).

Let me offer an example of a common screw job program. A stock drives on the open, comes off very little and starts to consolidate close to the high of the day on a tight range for a significant period of time. You can spot plenty of buy interest on the bid, the buying is clear. The stock spends so much time consolidating that the VWAP and moving averages start to catch up to the price action. You see a tremendous opportunity to “load the boat” with little risk on the consolidation calculating the stock has another leg higher.

The stock takes the top of the consolidation with volume and you add to your position. You know you are in the driver’s seat. I start the theme music to “Jaws”, and our desk’s group of traders I have affectionately termed the Shark Tank, communicating an excellent trading opportunity to the firm. Then out of nowhere there is more selling interest, the bottom of the consolidation drops and you bang out of the play. 15 minutes later the stock is making new highs without you in it. Talk about getting bitten by the market. Sound familiar?

Check out these charts of BAX to illustrate my point from above. One shows the intraday price action on a 3 minute chart while the 15 min and 60 min chart give us a clue of the upside of the play.

BAX Gman

I know I have been a victim to this screw job algorithm at least 30 times in the last month.  But lately I have started to catch up to their nonsense and have had to make some adjustments.

  1. Increase the stop loss on the position
  2. Trade with less size until witnessing the screw job then lay into the position when it gets back above the level.
  3. Stay light or flat on the setup, wait for the screw job and then add while the screw job is taking place. Then lay into the position when the panic subsides.
  4. Trade more in premarket and after hours when there are very few/no algorithms.

Dr. Brett Steenbarger once told me:  turn frustration into opportunity. Doing the steps above have helped me tremendously. Clearly the algorithms have some advantages but the trader who adapts will always come ahead. Happy trading!!

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  • Mike
    What you descibe is called a bull trap. I read it in a book on TA from the early 20's. Stop making excuses for your trading. Adopt or die. Christopher H. great post. I would add to it that trading is cyclical, between withing stocks universe and other classes like futures, fx, real estates. etc.
  • Christopher H.
    This trading chopfest began at the start of October at the drop of a hat. It's not like we've been gradually coming to this and I think there is a reason why this is happening. But, whatever the reason is we don't know how long it will last, and as professionals our job is to adapt to the current conditions.

    From what I'm reading here and hearing from other traders at my firm one of the biggest things thats been affected is our confidence. Part of the main reason traders aren't getting paid right now is because they get frustrated and don't follow through in spots where they usually would do so. Mental strength is our biggest asset and must be worked on the most, the rest will follow.

    AS far as using less size goes....size is relative, to one trader 5,000 share clip might be his ceiling, and for another it's his starting point. Using less size goes back to confidence, and if it helps you trade better by using less than you should certainly stick with it. But, using less size alone will not solve your problems.

    What has been working for me I've noticed is using incredibly relatively weak or strong stocks on the day. The less they follow the market the better, and the follow through on set ups in those stocks tend to work most of the time. This is the biggest tip I can write as it has been almost P & L saving to me along with keeping my head clear and staying confident in my system.

    Do whatever you must just stop doing what you're doing right now if it's not giving you the results you're seeking. Don't wait for the market to adapt to your trading style, that will most likely not happen. Instead, adapt to the market and get your confidence back.
  • Thanks for the excellent comment, Christopher.
  • Thank you all for the insightful comments. Michael I think you are right. As I sit here I just witnessed a screw job in FLR. I am talking to the trader to my left as to how to properly trade the screw job these days.

    Richard, like I said in the article it is best to have little to no size on the actual setup and then load up on the screw job. Even if it means having little size if the plays starts to develop. It is the risk we have to take these days.

    I agree it is tough to beat a computer but we are catching on to their games. They are not that hard to figure out. Like I always say, fool me once shame on you, fool me twice..you can't fool me all the time. Okay maybe 30-40 times by now but I am determined to crush those programs thousand bucks at a time :) Happy trading to all.
  • Moti
    While I totally understand the frustration, why do you think a computer is doing this and not other traders, and what is the connection to 'high frequency algorithms'? I believe that those are a different animal.
  • I agree this can become an issue. That said I think this is one of the great opportunity times for day traders we have ever seen.

    I think the main problem is that traders get frustrated when this happens. They are not nimble in their psychology or their trades. They lose on the first trade and then don't make the next trade that will be profitable. If we take trades where our probable gain is greater than our risk we should be able to come out on the profitable side.
  • I've noticed this happening a lot as well. Sometimes when I see it happening I totally call it, I wait and eventually I get the action I want. BUT I've also been screwed because now sometimes I think that it's a screw job and I'm waiting it out, and then I realize..no it's just me getting actually screwed and end up losing more than I prefer.

    Tough market to trade these days, it's hard to beat a computer.
  • jt
    its criminal....how do u ever get printed within 10cents of where u want it? between the backing away, 100 share fills, and 1-3 point body slams, my income has litterally been chopped 50%
  • Wouldn't it make sense to maybe wait for the "srew job" setup itself and then trade it? Just a thought.
  • Brock Joll
    This market has been very challenging to trade. It is a chop haven. Up one day, down the next, no clear direction and lots of confusion out there...
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This post was written by:

Gilbert Gman Mendez - who has written 14 posts on Wall St. Cheat Sheet.


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