FvFft3ug7B0q setxyrapport 25 setxunit 7.5 setborder -5 5 setxrange -5 5 setyrange jpegmode /gavinmarshalldental.com/bitcoin-to-usd-historical-chart.html">bitcoin to usd historical chart</a> /gavinmarshalldental.com/btc-trade-bot.html">btc trade bot</a> 1 1 settkstep .5 .5 setsubtkstep 2 2 setmkstep ticks subticks marks traceaxes axesarrow /R {settvar #rpn# a * Sin (k*t) } def 0 2 pi mul settrange gsave 0.75 setlinewidth continu bleu (R) courbepolar grestore