some of surf's predicessors may be of interest to youQuote from sculptor66:
I would guess that the price driver index ist calculated by adding the directions (-x for down, +x for up, where x may vary with importance of the index component; an there can be, of course an inverse relationship) of select other markets and intermarket relationships... am I right?
Most QA types of trend drivrers use percentile groupings. There the names are qualitative instead of quantitative.
Before that, there were "indicators" based upon each market direction. Naturally, they were NOT centered on zero since it is very important to not have a "sign" added to muddy the waters.
For smoothing these trend drivers also worked by showing interim slopes within the trend. It was also important for the designers and developers to note in advance when a switch from one of the sentiments to the other was pending. Two line theory was often used, as well.
All of the above has also been merged in modern times using a C++ type coding and then converting that to a RDBMS.
Here is a quicky in code (Arithmetic operators are used ..lol....) that is a terrific refinement:
(DMI plus (7, false) + DMI minus (7. False)) - 50
The seven data imputs smooth The DMI equations are well known and well used (WW is their creator). The 50 is the offset as mentioned above.
most platforms have this capability as part of the "highlighting" to produce trading signals. When the signal occurs it is conducted via the API to the trading account(S). I notice surfer is up to 10 contracts in two accounts.