//------------------------------------------------------------------------------
//
//  Formula Name:    Price-Volume Rank
//  Author/Uploader: Tomasz Janeczko 
//  E-mail:          tj@amibroker.com
//  Date/Time Added: 2001-06-16 08:29:55
//  Origin:          Presented in TASC magazine
//  Keywords:        oscillator
//  Level:           basic
//  Flags:           indicator
//  Formula URL:     http://www.amibroker.com/library/formula.php?id=14
//  Details URL:     http://www.amibroker.com/library/detail.php?id=14
//
//------------------------------------------------------------------------------
//
//  A Price Volume Rank. Buy/Sell at 5/10-day crossovers. Buy when fast line
//  crosses below 2.5. Sell when fast line crosses above 2.5. Use turn-around
//  points cautiously. Remember that a climbing PVR line indicates a weakening
//  market. Make another indicator using a double-smoothing to use a less
//  volatile graph. Thanks to Donald Dalley for the description
//
//------------------------------------------------------------------------------

/* Price-Volume Rank Indicator
   Use a 1 if price and volume are up
   Use a 2 if price is up and volume is down
   Use a 3 if price and volume are down
   Use a 4 if price is down and volume is up

  Plot a 5-day and a 10-day MA of these values.
  Buy/Sell at 5/10-day crossovers.
  Buy when fast line crosses below 2.5.
  Sell when fast line crosses above 2.5.

  Use turn-around points cautiously.
  Remember that a climbing PVR line indicates a
  weakening market.
  Make another indicator using a double-smoothing
  to use a less volatile graph.
*/

P1 = REF( CLOSE, -1 );
V1 = REF( VOLUME, -1);

PVR = IIF( CLOSE >  P1 AND VOLUME >  V1, 1,
      IIF( CLOSE >  P1 AND VOLUME <= V1, 2,
      IIF( CLOSE <= P1 AND VOLUME <= V1, 3, 4 )));

GRAPH0 = MA( PVR, 5 );
GRAPH1 = MA( PVR, 10 ) ;