From 043bc985df6de9dbb8ba966920fb14349973f4b2 Mon Sep 17 00:00:00 2001
From: Tyler Goodlet <jgbt@protonmail.com>
Date: Fri, 6 Nov 2020 11:35:10 -0500
Subject: [PATCH] Configure L1 queue size precisions from history

---
 piker/ui/_chart.py | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/piker/ui/_chart.py b/piker/ui/_chart.py
index b0859aac..004e6b8f 100644
--- a/piker/ui/_chart.py
+++ b/piker/ui/_chart.py
@@ -31,7 +31,7 @@ from ._style import (
     _bars_from_right_in_follow_mode,
     _bars_to_left_in_follow_mode,
 )
-from ..data._source import Symbol
+from ..data._source import Symbol, float_digits
 from .. import brokers
 from .. import data
 from ..data import maybe_open_shm_array
@@ -811,11 +811,19 @@ async def chart_from_quotes(
 
     chart.default_view()
 
-    # last_bid = last_ask = ohlcv.array[-1]['close']
-    l1 = L1Labels(chart)
+    last, volume = ohlcv.array[-1][['close', 'volume']]
+
+    l1 = L1Labels(
+        chart,
+        # determine precision/decimal lengths
+        digits=max(float_digits(last), 2),
+        size_digits=min(float_digits(volume), 3)
+    )
 
     async for quotes in stream:
         for sym, quote in quotes.items():
+            # print(f'CHART: {quote}')
+
             for tick in quote.get('ticks', ()):
 
                 # print(f"CHART: {quote['symbol']}: {tick}")