var spikeOrder;
var lastPrice = trader.get("LastPrice");
var asksPrice = trader.get("AsksPrice",100); // get the price 100 coins away


if (asksPrice - lastPrice > 10) { // if price diff is worth a trade
  var orders = trader.get("Orderbook", asksPrice-1, asksPrice+1); // get the orders around target price
  for (i = 0; i < orders.length; i++) { 
    if (orders[i].volume > 10) { // check for big orders
      asksPrice = orders[i].price - 0.01; // set target price in front of big order
      break;
    }
  }
  if (spikeOrder) { // remove previous order
    trader.cancelOrder(spikeOrder);
  }
  spikeOrder = trader.sell(1, asksPrice); // place order
  
}

   var orders = trader.get("Orderbook", lastPrice, lastPrice+30); // get ask orders 
   for (i = 0; i < orders.length; i++) { 
     if (orders[i].volume > 50) { // check for walls
      trader.say("Ask wall " + orders[i].volume + " at " + orders[i].price);
     }
  }

function checkOrderbook() {

	var lastPrice = trader.get("LastPrice");
	var asksPrice = trader.get("AsksPrice",500);
	var asksVolume = trader.get("AsksVolume", 500); // at lastPrice 476

	trader.log("lastPrice: ", lastPrice); // returns 476
	trader.log("asksPrice: ", asksPrice); // returns 0
	trader.log("asksVolume: ", asksVolume); // returns 0

}