public void updateAll(Globalprice gp) {
		for (MarketSign sign : sellsigns) {
			if (sign.getGp().equals(gp)) {
				this.update(sign);
			}
		}
		for (MarketSign sign : rentsigns) {
			if (sign.getGp().equals(gp)) {
				this.update(sign);
			}
		}
	}