Thank you for your reply. But I have tested this method before, But I don’t know why proscreener doesn’t accept any loop more than 100, it will give an error as infinite loop exit in the code. I want to write a code to find trend of rsi in rising or falling channel. For example something like the image attached. Below is the code I have done so far, sometime it will work fine sometime not. did you come with this idea before or do you have this kind of code?

MinimumRsi=100
meet=0
For x=1 to 100 Do //loop through 100 bar to find Min Rsi
IF rsi[14](close)[x] < MinimumRsi THEN
MinimumRsi=rsi[14](close)[x]
barNb=x
ENDIF



NEXT

isBearish=0
For x=1 to 20 Do // if first 20 bar RSI is less than 40 is bearish mode
IF rsi[14](close)[x] < 40 THEN
isBearish=1
break
ENDIF

NEXT
fail=1
m=(rsi[14](close)[0]-MinimumRsi)/(0-barNb) //find equation of a line with two points y=mx+b m is slope and b is is the y-intercept.

b=MinimumRsi-(barNb*m)

FOR i=1 to barNb DO
y=m*i+b
IF y+0.1 > rsi[14](close)[i] AND y-0.1 < rsi[14](close)[i] THEN
meet=meet+1

ENDIF

IF y -0.1 > rsi[14][i] THEN
fail=0
break
ENDIF
NEXT
condition=0
IF meet >=1 THEN
condition=1
ENDIF

// if current stock rsi is close to the line

SCREENER [condition AND fail AND isBullish]

rsi-trendline.png