how to scale inclined texts on mt4 charts?

d5400
this is what i think the most accurate solution .. fit1 / fit2 to adjust the slope before using arctan function to get angle in radians . .
. .
it gives accurate results on the chart, draw text to parallel it line (trend-line)
but i can not justify "why" ?
could you justify it? scientific, mathematical justification , that must convince me . .
look at the code output: text parallel the line (we take the slope of the line to set text degrees)
1) we take the slope of the line (y1-y0)/(x1-x0)
2) but it does not help, you name time axis and price axis !! no correlation!!
3) so i try to add factor fit of chart (width in candles, and height in price difference) using:
4) it helps a little! something better than nothing . .
4) later i try to add factor fit2 of the chart width and height but in pixel, the result is below... accurate, but mentally i can not justify!!
could anybody justify!! ?
factor: fit/fit2 ???? make things fine? why?
when you zoom in/out the chart, or compress/decompress, it reacts correspondingly, with accurate parallelism ??
when you attach it
move the trend line by mouse(you have 3 sec to do) , then check if text moving accordingly with the same angle . .
. .

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resolution=( widthW * heightP ) / ( widthP * heightW ) . . . . . therefore unit is candles/price
W: Window
P: Pixel
since:
heightW=(WindowPriceMax()-WindowPriceMin())
widthW=WindowBarsPerChart()
heightP=ChartGetInteger(0,CHART_HEIGHT_IN_PIXELS)
widthP=ChartGetInteger(0,CHART_WIDTH_IN_PIXELS)

anyone know better rule?
.. if yes, do not hesitate , ,, share . .
. . .

.

d5400
if possible, any web thread about this issue . .

this is my result. looks ok.

Hi all. If I understand your problem I think it's the scaling of charts as MT4 uses linear scaling wich distorts the scaling on different time frames. Using semi logarithmic scaling could fix this if I'm right. A lot of MTF indicators face the same issue of having wrong values on lower time frames. Maybe this site could enlighten you https://stocata.org/ta_en. /basic2.html. Nevermind if I'm wrong as my math is moderate. Anyway Your work is very good and deserves the perfection, thanks.

could we justify our equation?
resolution=( widthW * heightP ) / ( widthP * heightW ) . . . . .

if the dimensional unit of x quantity is price/candles . .

the problem is how to fit rotating text to be parallel to the trend line, or any inclined line ..
look at this picture:

i try my equation on different situation (zooming, compressing, angles etc . . ) . . i think this is the best and final solution ..
but still it is hard to justify .. it seems logical .. but i must be convinced 100% ..

we know:
x-axis is the time (or candles) axis
also from screen W/H side, in pixel
also
y-axis if the price axis
and from screen W/H side is also in pixel

It all makes sense. These are necessary and sufficient. You have to know the height in pixels because text has to be rotated in relation to width in pixels. You have to know the width in pixels because you only know the bars per chart. It is more direct than working with time. Well done.

"how to scale rotated text objects on mt4 charts" ... from d5400
for web engines search ..
it is very important topic for many . .

inclined trends:
the trend equation on the chart . . .
you can get the value of the trend without any need to draw the trend . . . no need for the ObjectGetValueByShift

to get the value of the trend y0 at candle # x0, use this equation:

y0=y2-(y2-y1)/(x2-x1)*(x2-x0)

where points(y2,x2) and (y1,x1) are the main trend vertices . .

which is the famous linear equation y = m x + b

assume you need trend value for tomorrow candle. then x0 must be -1
minus for future, since mt4 charts drawn from left to right . .

look at the picture:

what is the trend value today?

Ans:

1) you can get it using eq: y0=y2-(y2-y1)/(x2-x1)*(x2-x0)
since x2=199, x1=108, y2=1.59006, y1=1.72216, x0=today candle=0

2) or draw the trend, then draw vertical line on trend today cross (manual)

3) or programming using ObjectGetValueByShift