Add trend MACD spot strategy

tests/test_bybit.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from crypto_spot_bot.bybit import BybitClient, _looks_like_leveraged_token, _looks_like_stablecoin
+from crypto_spot_bot.bybit import BybitClient, websocket_subscribe_message, _looks_like_leveraged_token, _looks_like_stablecoin
 
 
 def test_leveraged_token_filter() -> None:
@@ -56,3 +56,10 @@ def test_live_spot_order_explicitly_disables_leverage(make_settings, tmp_path) -
     assert captured["payload"]["category"] == "spot"
     assert captured["payload"]["isLeverage"] == 0
     assert captured["payload"]["orderFilter"] == "Order"
+
+
+def test_websocket_subscribe_uses_configured_kline_interval() -> None:
+    payload = websocket_subscribe_message(["BTCUSDT"], interval="60")
+
+    assert "kline.60.BTCUSDT" in payload
+    assert "kline.1.BTCUSDT" not in payload