OSCP function - What does this do?

r1 = Param( "Fast avg", 9, 2, 200, 1 );
r2 = Param( "Slow avg", 18, 2, 200, 1 );
Plot( OSCP( r1,r2), _DEFAULT_NAME(), ParamColor( "Color", colorCycle ), ParamStyle("Style") );

Hello, can anyone tell me what r1,r2 means int he above code? Is it divide r1 by r2? what is the outomce of r1,r2 please?

See the manual for OSCP http://www.amibroker.com/f?oscp
r1 and r2 are parameters for Price oscillator. All "oscillators" are generally differences. In this case it is difference between two exponential moving averages (similar to MACD line)

Thank you...appreciated