//curl "https://api.bitflyer.jp/v1/getticker?product_code=btc_jpy" |jq
{
"product_code": "BTC_JPY",
"timestamp": "2019-04-18T13:44:00.86",
"tick_id": 2293312,
"best_bid": 589013,
"best_ask": 589318,
"best_bid_size": 0.585,
"best_ask_size": 0.08,
"total_bid_depth": 1550.51319559,
"total_ask_depth": 1297.06842539,
"ltp": 589014,
"volume": 338501.36122382,
"volume_by_product": 2864.78877239
}