Ok. Here is the general math on an averaged down trade. I believe it to be logical as it renders me a high win rate, which I believe is necessary to successful scalping.
First, I have a max I will let any trade go against me before I will concede my premise is wrong. This is based on previous price action and is a result of the immediate volatility. This is not my SL but is the point at which I give up and will not hold a trade any more but will rather exit all positions then Double or triple up and go in the unanticipated market direction. By having this premise established before my entry I give myself the opportunity to average down, if and only, the larger context supports doing so, as well as the immediate context supporting it too.
ok this premise is established. For arguments sake lets say the bigger contexts support shorting...i.e. weakness in the background...the immediate context is a 21 bar sideways range...price is at the top of the range. Knowing 80% of attempted BO’s fail I will immediately short lets say at 2930 which is at, or near, the top of the TR. Price goes to 2932. I am adding (the size of the addition depends on “how” it got to 2932. Ok it goes to 2933. I am adding again. It goes to 2934 I am adding again. It has broken out of the top of the range. I am expecting it to trade back into the range Within 5 bars or so with at least enough for a scalp. So, I am loaded up and leveraged my position for an expected move down based on the observation that 80% of BO’s attempts fail. So, I average down instead of jumping out with a loss and repositioning myself again. Basically, by doing so my BE point is closer plus if the 80% works out I am loaded for a bigger profit and it won’t have to trade far back into the range for me to be in profit. So, where is the math on my averaged down exit? And how do I exit? Generally, here is my math. It is visual. When I see the move down give me a tick or two profit on my first entry then I am all out ALL at one wack and flat. However, even that exit is somewhat contingent on “how” the move down towards my first entry was made. Grinding..fast..violent..adverse movement against me after my last averaged down entry. Again the dynamics. In ranges price tends to trades down to the bottom of a range and then back up and repeats. However it may linger near the top for 10 bars. I could hold for a bigger move down but I generally prefer to scalp over and over as it lingers near the top locking in those profits. Just repeating the describe trading above over and over as it lingers. Sooner or later it will BO of the top, on a successful BO, or it will trade to the bottom of the range. I ain’t gonna sit there and wait for either scenario. I am a scalper. It is what I do.
Experience shows me I have a high probability of making money averaging down in the above conditions. That is that once the failed BO attempt happens I have a very good chance that price will reach my initial entry plus a tick ir two to cover commissions on that first entry. If it lingers, not quite making it there, then I will grab whatever it gives me. Maybe a small loss on my first entry and a profit on my successive entries for an overall profit on the trade. I consider an averaged down trade as one trade with multiple entries and an all out exit.
If you know how to code then code up what you can of this and check it out. However, I am of the opinion while portions of the tactic could be coded it is nigh impossible to code dynamics. Only the human brain can see and react to dynamics hence I am a discretionary trader. Even though in years past I built and had software written to trade stocks off a 3 to 5 day cycle. I no longer use the software. It won’t work off windows 10.