It took all of three seconds using the search box and typing in ’round numbers’ to find this:

Sweet Spots – round numbers

You should try the search box some time as it is quite useful! 🙂

I’m not sure exactly what you are asking for. With MainLevels = 100 and SubLevels = 100 it draws lines at 100 intervals. I did spot a couple of little errors in the code. The FOR NEXT loop should start from 1 and not from zero and the addition or subtraction of 0.51 should be 0.5.

Here is a version of that code that simply returns the nearest round number above price and below price.

MainLevels = 100

DecAr = MainLevels*pointsize

myVarUp = close
myVarDn = close

if DecAr = 0 then
InvDec = 1
else
InvDec = 1/DecAr
endif

Floor = round(InvDec*myVarDn-0.5)/InvDec
Ceil = round(InvDec*myVarUp+0.5)/InvDec

return floor, ceil

Yes but in this indicator we always want to be a number above so if the current price is 1.0 then rounding with +0.4 will return 1.0 whereas we need it to be 2.0  To get 2.0 we have to add on 0.5

In a normal rounding situation you are correct as 1.0 should return 1 when rounded but not if we want to always find the next whole number above the current value.

Maybe it has some parts of interest

https://www.prorealcode.com/prorealtime-trading-strategies/big-line-strategy/