diff --git a/modules/purchase_trade/docs/business-rules.md b/modules/purchase_trade/docs/business-rules.md
index 21a3bdc..9ea948d 100644
--- a/modules/purchase_trade/docs/business-rules.md
+++ b/modules/purchase_trade/docs/business-rules.md
@@ -910,3 +910,8 @@ Pour cette regle, couvrir au minimum:
 - Le widget SAO `tolerance_gauge` est autorise dans les schemas de vues
   `form` et `tree` avec `min`, `max`, `min_field`, `max_field`, `center` et
   `digits`.
+- En formulaire de ligne (`purchase.line` / `sale.line`), ne pas encapsuler
+  `tolerance_gauge` et `targeted_qt` dans un sous-groupe `colspan="4"`: cela
+  decale visuellement le bloc vers la droite dans SAO. Les placer directement
+  dans la grille principale et forcer `xalign="0"` sur la jauge et sur
+  `targeted_qt` pour garder un alignement a gauche stable.
diff --git a/modules/purchase_trade/docs/business/lots-and-quantities.en.md b/modules/purchase_trade/docs/business/lots-and-quantities.en.md
index b0b0b65..c9a455f 100644
--- a/modules/purchase_trade/docs/business/lots-and-quantities.en.md
+++ b/modules/purchase_trade/docs/business/lots-and-quantities.en.md
@@ -339,6 +339,10 @@ them with Python guards and SQL diagnostics.
 <td style="vertical-align:top; padding:0.5rem 0.7rem;">Matching gauge</td>
 <td style="vertical-align:top; padding:0.5rem 0.7rem;">In <code>Go to matching</code>, the gauge projects <code>already matched + Qt to match</code> against <code>quantity_theorical</code>, with <code>-tol_min</code> / <code>tol_max</code> bounds.</td>
 </tr>
+<tr style="border-bottom:1px solid #e0e0e0;">
+<td style="vertical-align:top; padding:0.5rem 0.7rem;">Line gauge layout</td>
+<td style="vertical-align:top; padding:0.5rem 0.7rem;">On <code>purchase.line</code> / <code>sale.line</code> forms, place the gauge and <code>targeted_qt</code> directly in the main grid, without a <code>colspan=&quot;4&quot;</code> subgroup, and use <code>xalign=&quot;0&quot;</code> to avoid a double right shift.</td>
+</tr>
 </tbody>
 </table>
 
diff --git a/modules/purchase_trade/docs/business/lots-and-quantities.md b/modules/purchase_trade/docs/business/lots-and-quantities.md
index 54d5766..302408c 100644
--- a/modules/purchase_trade/docs/business/lots-and-quantities.md
+++ b/modules/purchase_trade/docs/business/lots-and-quantities.md
@@ -338,6 +338,10 @@ puis les sécuriser par des checks Python et des diagnostics SQL.
 <td style="vertical-align:top; padding:0.5rem 0.7rem;">Jauge matching</td>
 <td style="vertical-align:top; padding:0.5rem 0.7rem;">Dans <code>Go to matching</code>, la jauge projette <code>déjà matché + Qt to match</code> contre <code>quantity_theorical</code>, avec bornes <code>-tol_min</code> / <code>tol_max</code>.</td>
 </tr>
+<tr style="border-bottom:1px solid #e0e0e0;">
+<td style="vertical-align:top; padding:0.5rem 0.7rem;">Layout jauge ligne</td>
+<td style="vertical-align:top; padding:0.5rem 0.7rem;">En formulaire <code>purchase.line</code> / <code>sale.line</code>, placer la jauge et <code>targeted_qt</code> directement dans la grille principale, sans sous-groupe <code>colspan=&quot;4&quot;</code>, et utiliser <code>xalign=&quot;0&quot;</code> pour éviter un double décalage vers la droite.</td>
+</tr>
 </tbody>
 </table>
 
diff --git a/modules/purchase_trade/docs_source/business/lots-and-quantities.en.md b/modules/purchase_trade/docs_source/business/lots-and-quantities.en.md
index 3d864b6..73be150 100644
--- a/modules/purchase_trade/docs_source/business/lots-and-quantities.en.md
+++ b/modules/purchase_trade/docs_source/business/lots-and-quantities.en.md
@@ -127,6 +127,7 @@ quantity_theorical
 | Line gauge | On a line with physical lots, the gauge uses the sum of physical lots; without physical lots, it uses the sum of linked `lot.qt`. |
 | Header gauge | The purchase/sale gauge is the weighted average of line gauges, weighted by `quantity_theorical`. |
 | Matching gauge | In `Go to matching`, the gauge projects `already matched + Qt to match` against `quantity_theorical`, with `-tol_min` / `tol_max` bounds. |
+| Line gauge layout | On `purchase.line` / `sale.line` forms, place the gauge and `targeted_qt` directly in the main grid, without a `colspan="4"` subgroup, and use `xalign="0"` to avoid a double right shift. |
 
 ## Developer Section
 
diff --git a/modules/purchase_trade/docs_source/business/lots-and-quantities.md b/modules/purchase_trade/docs_source/business/lots-and-quantities.md
index 216e3cf..8aaeab5 100644
--- a/modules/purchase_trade/docs_source/business/lots-and-quantities.md
+++ b/modules/purchase_trade/docs_source/business/lots-and-quantities.md
@@ -126,6 +126,7 @@ quantity_theorical
 | Jauge ligne | Sur une ligne avec lots physiques, la jauge utilise la somme des physiques ; sans physique, elle utilise la somme des `lot.qt` liés. |
 | Jauge header | La jauge purchase/sale est la moyenne pondérée des jauges de lignes au prorata de `quantity_theorical`. |
 | Jauge matching | Dans `Go to matching`, la jauge projette `déjà matché + Qt to match` contre `quantity_theorical`, avec bornes `-tol_min` / `tol_max`. |
+| Layout jauge ligne | En formulaire `purchase.line` / `sale.line`, placer la jauge et `targeted_qt` directement dans la grille principale, sans sous-groupe `colspan="4"`, et utiliser `xalign="0"` pour éviter un double décalage vers la droite. |
 
 ## Section développeur
 
diff --git a/modules/purchase_trade/purchase.py b/modules/purchase_trade/purchase.py
index b8a3a21..940fb02 100755
--- a/modules/purchase_trade/purchase.py
+++ b/modules/purchase_trade/purchase.py
@@ -1691,8 +1691,9 @@ class Line(metaclass=PoolMeta):
 
     def _get_basis_component_price(self):
         price = Decimal(0)
-        if self.terms:
-            for t in self.terms:
+        terms = getattr(self, 'terms', None)
+        if terms:
+            for t in terms:
                 price += (t.manual_price if t.manual_price else Decimal(0))
         else:
             if not self.price_components:
diff --git a/modules/purchase_trade/tests/test_module.py b/modules/purchase_trade/tests/test_module.py
index 70d5164..13be345 100644
--- a/modules/purchase_trade/tests/test_module.py
+++ b/modules/purchase_trade/tests/test_module.py
@@ -1588,7 +1588,6 @@ class PurchaseTradeTestCase(ModuleTestCase):
         line.id = 1
         line.price_type = 'basis'
         line.price_components = []
-        line.terms = []
         line.enable_linked_currency = False
         line.linked_currency = None