can someone explain me the parameters of this S/R indicator

 

i want to make the settings of this indicator it should work accordingly with my strategy but somehow i'm not able to interpret the parameters on it

i attached a screenshot of the parameters as they look like in mt4 and i also attached the open source mq4 file so you people can look at tit and tell me what these following parameters are

 

BarsMax

ExtDepth

ExtDeviation

ExtBackSteps

DeleteObjectOnExit

 

Thanks  a lot 

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