What type of this indicator?

[rockballad]

Dear all,

Please take a look here

https://www.mql5.com/go?link=http://ne6.upanh.com/b3.s19.d2/ef45b92d57b5be66454fa0927892c59f_37025626.chart.png

I find this chart with 5-curve-parallel lines, but I don't know exactly what type of it. I think it's from MA but it looks so smooth. It's likely a band (BMA, etc) or trend (SHI)... Could you help me to find or to code this indicator?

Thank you and best regards,

RB