Error 703. Rotational trading requires PositionScore variable.

When trying to use the Rotational backtest mode you must define PositionScore variable that decides how symbols are ranked and sorted. Example PositionScore assignment is presented below:

EnableRotationalTrading();
SetOption("WorstRankHeld",5);

PositionSize = -
25; // invest 25% of equity in single security
PositionScore =
50 - RSI(); // THIS IS REQUIRED for rotational mode

For more details see Rotational Trading mode