Support Board

I set up a study based on a spreadsheet to display closeCash support levels; openIB; openCash..
I use a spreadsheet based on an OHLC chart in 30mn.
I limit the number of SC lines to 1 day.
I identify in the klm columns the values ​​corresponding to the desired TPOs.
until then everything is fine, I recover well by calculation the price levels for each desired support line.
the problem comes in the display:
everything is displayed correctly if I put a diamond, a cross or a dot, but no way to display a line.
I tried for the subgraphs to display the following "Draw style" without success:
line; line-skip zero; line extend to edge; stair step to edge -> stops at the next candlestick
line at last bar to edge; line at last bar to left/right side -> display disappears

I tried to add a "study subgraph add" based on the spreadsheet but I have exactly the same result.
Is there an error at my level or is there another way to draw a line on a level determined by spreadsheet?

finally, the study line "based on" the study spreadsheet does not return the parameters allowing it to be assigned the desired value.