concept G22PassiveTradingStrategy extends G22TradingStrategy {
  // A regular expression that will be used to match
  // the "strategy" field coming from TradingView to
  // distinguish this strategy from others on the same coin.
  settableWithVar S tradingViewRegexp;
  
  void price(double price) {
    if (currentPrice == price) ret;
    currentPrice = price;
    afterStep(); change();
  }
  
  bool tradingViewMatch(S text) {
    ret empty(cleanedTradingViewRegexp())
      || safeRegexpFindIC(cleanedTradingViewRegexp(), text);
  }
  
  S cleanedTradingViewRegexp() {
    ret trim(tradingViewRegexp);
  }
  
  LS addPassiveTradingStatus(LS list) {
    if (nempty(tradingViewRegexp))
      list.add("TradingView regexp: " + cleanedTradingViewRegexp());
    ret list;
  }
  
  LS status() {
    list = addPassiveTradingStatus(super.status());
  }
  
  LS activationStatus() {
    ret addPassiveTradingStatus(super.activationStatus());
  }
}